IncomeWikiRevision 1
Email Marketing
@namkyu · Sep 1, 2026, 8:19 AM
Added email marketing workflow, tools, automation, deliverability, and compliance.Email marketing is the use of email to communicate with subscribers, customers, and prospects for purposes such as sales, product education, retention, announcements, and relationship building.
Businesses can use email marketing to promote products, recover abandoned carts, onboard new users, send newsletters, announce launches, educate customers, and automatically follow up based on user behavior.
Unlike social media, an email list is typically built around direct subscriber relationships rather than dependence on a public-feed algorithm.
Item | Details |
|---|---|
Main goal | Generate sales, retention, engagement, and repeat visits |
Common uses | Newsletters, promotions, onboarding, abandoned carts, product education |
Coding required | No for most campaigns |
Common tools | Mailchimp, Klaviyo, HubSpot |
Free tools available | Yes |
Mailchimp starting paid plan example | From about $20/month |
Klaviyo free plan | Up to 250 profiles and 500 emails/month |
Gmail bulk-sender threshold | About 5,000 messages/day to personal Gmail accounts |
Key technical requirements | SPF, DKIM, DMARC, unsubscribe support |
Difficulty | Beginner to advanced |
Email marketing usually follows a simple process:
Visitor joins list → Subscriber receives emails → Emails educate or promote → Subscriber clicks → Subscriber purchases or takes another action
The important part is not simply sending more email.
A useful email program depends on:
Permission
Relevant content
Segmentation
Timing
Deliverability
Clear calls to action
Measurement
A newsletter is sent regularly to subscribers.
Common content includes:
Industry news
New articles
Product updates
Company updates
Curated resources
Educational content
Newsletters are useful for staying in contact with an audience even when there is no immediate promotion.
Promotional emails are designed to generate a sale or another direct action.
Examples include:
Product launch
Limited-time discount
Seasonal sale
New collection
Event promotion
Upgrade offer
Promotional emails should clearly explain:
Offer
Benefit
Deadline if applicable
Call to action
A welcome email is sent after someone subscribes or creates an account.
It may include:
Introduction
What to expect
Useful resources
Product explanation
Discount
Next step
Welcome emails are often part of an automated sequence rather than a single message.
Onboarding emails help new users understand a product or service.
A sequence might include:
Account setup
Core feature introduction
Tutorial
Use case
Success example
Upgrade invitation
This is particularly common for SaaS businesses.
E-commerce businesses can send reminders when a customer adds a product to a cart but does not complete the purchase.
A sequence may include:
Reminder
Product image
Benefits
Reviews
Discount if appropriate
The exact strategy should reflect the store's economics rather than automatically offering a discount.
Post-purchase emails can include:
Order confirmation
Usage instructions
Product education
Review request
Cross-sell
Reorder reminder
These messages can improve customer experience and repeat purchases.
Re-engagement campaigns target subscribers who have stopped opening or clicking emails.
Possible messages include:
Preference update
New offer
Content reminder
Subscription confirmation
Inactive subscribers may eventually be removed from active marketing lists to protect deliverability and reduce software costs.
Email marketing begins with permission-based list growth.
Common methods include:
Website signup form
Newsletter signup
Lead magnet
Free tool
Discount
Account creation
Webinar registration
Checkout opt-in
Event registration
Avoid purchasing random email lists.
Purchased lists can create:
Spam complaints
Poor engagement
Deliverability problems
Legal risk
Platform-account problems
A smaller engaged list can be more valuable than a large list of people who never asked to receive messages.
A lead magnet gives visitors a reason to subscribe.
Examples include:
Checklist
Template
Guide
Calculator
Free course
Report
Industry data
Coupon
Free trial
The lead magnet should attract the type of subscriber the business actually wants.
A broad giveaway may generate many subscribers who never become customers.
Segmentation divides subscribers into groups.
Possible segments include:
New subscribers
Customers
Non-customers
High-value customers
Recent purchasers
Inactive users
Product interest
Geographic location
Engagement level
Segmentation allows different users to receive different messages.
For example:
A customer who already purchased a product should not necessarily receive the same introductory campaign as a first-time visitor.
Personalization can include more than inserting a first name.
Useful personalization may be based on:
Previous purchases
Viewed products
Account activity
Location
Subscription type
Customer lifecycle stage
The goal is to send more relevant messages rather than simply adding personal data for appearance.
Automation sends emails when a specific event happens.
Common triggers include:
Subscription
Account creation
Purchase
Abandoned cart
Trial expiration
Product usage
Inactivity
Birthday
Renewal date
For example:
New signup → Welcome email → Product tutorial → Use-case email → Upgrade offer
Automation is valuable because the sequence continues without manually sending each email.
A campaign is usually sent at a specific time to a selected audience.
Examples:
Friday newsletter
Black Friday promotion
Product launch
An automation is triggered by user behavior or a lifecycle event.
Examples:
Welcome sequence
Cart abandonment
Re-engagement
Post-purchase sequence
Most mature email programs use both.
A marketing email generally includes:
Sender name
Subject line
Preview text
Main message
Call to action
Unsubscribe option
The email should make the intended action clear.
Avoid unnecessary complexity.
A simple email with one clear message can perform better than a visually complex message containing many unrelated offers.
Subject lines influence whether subscribers choose to open an email.
Useful approaches include:
Clear benefit
Specific topic
Curiosity
Urgency when genuine
Relevant announcement
Avoid deceptive subject lines.
The subject should accurately represent the message.
A call to action tells the subscriber what to do next.
Examples:
Shop now
Read the guide
Start free trial
View pricing
Complete setup
Book a demo
Do not overload every email with many competing actions unless the newsletter format requires several destinations.
Marketing emails can be:
Plain text
Lightly formatted
Fully designed HTML
The right style depends on the business.
E-commerce brands may benefit from product images and visual layouts.
Founder newsletters or B2B messages may intentionally look simpler and more personal.
Always check mobile readability.
Many users read email on phones.
Check:
Text size
Button size
Image width
Spacing
Subject length
Load speed
Layout
Test the email before sending it to the full list.
Deliverability refers to whether emails successfully reach recipients rather than being rejected or filtered.
Important factors include:
Sender reputation
Authentication
Spam complaints
Engagement
Sending behavior
List quality
Unsubscribe handling
A technically successful send does not guarantee that the message reaches the inbox.
SPF allows a domain to specify which servers are authorized to send email on its behalf.
It helps receiving mail systems identify unauthorized senders.
DKIM attaches a cryptographic signature to outgoing email.
Receiving providers can use the signature to confirm that the message was authorized by the sending domain and was not altered in transit.
DMARC builds on SPF and DKIM and provides instructions for how receiving providers should handle messages that fail authentication checks.
It also supports reporting.
Businesses sending significant email volume should understand all three technologies.
Google currently requires all senders sending messages to Gmail accounts to follow baseline authentication and delivery requirements.
For senders sending around 5,000 or more messages per day to personal Gmail accounts, additional requirements apply.
These include:
SPF
DKIM
DMARC
TLS
Valid DNS configuration
Low spam rates
Domain alignment
One-click unsubscribe for marketing and subscribed messages
A visible unsubscribe link
Google currently recommends keeping spam rates reported in Postmaster Tools below 0.3%.
Once Google classifies a sender as a bulk sender, that classification does not currently expire.
Marketing email should provide an easy way to stop receiving messages.
Do not hide or intentionally complicate the unsubscribe process.
Google requires qualifying bulk marketing senders to provide one-click unsubscribe.
Legal requirements also vary by country.
In the United States, commercial email is regulated by the CAN-SPAM Act.
Businesses sending promotional email should review current FTC requirements.
Important areas include:
Accurate sender information
Non-deceptive subject lines
Clear identification where required
Physical postal address
Opt-out mechanism
Honoring unsubscribe requests
Email regulations vary internationally, so businesses sending across markets should check applicable local laws.
Important metrics can include:
Delivery rate
Bounce rate
Open rate
Click rate
Unsubscribe rate
Spam complaint rate
Conversion rate
Revenue
Revenue per recipient
Do not evaluate an email program using only open rate.
Privacy features and email-client behavior can make opens less reliable than direct business outcomes such as clicks and purchases.
Click-through rate measures how many recipients clicked a link.
A high click rate can indicate:
Relevant offer
Strong call to action
Good audience targeting
Useful content
However, the final goal is often conversion rather than the click itself.
A conversion occurs when the email contributes to the desired action.
Examples:
Purchase
Demo booking
Trial signup
Registration
Upgrade
A campaign with fewer clicks but more purchases may be more valuable than one with many clicks but little revenue.
E-commerce and marketing platforms can attribute purchases to email campaigns and automations.
Attribution models vary.
Do not assume reported revenue means the email was the only reason the customer purchased.
Use the metric as a directional tool rather than an absolute representation of causality.
Mailchimp provides:
Email campaigns
Automation
Templates
Signup forms
Segmentation
Reporting
Its current pricing page lists:
Free options for small contact lists
Standard starting around $20/month after trial
Premium starting around $350/month in the current displayed configuration
Pricing depends on contact count and sending limits.
Mailchimp can be useful for:
Newsletters
Small businesses
General email campaigns
Basic automation
Klaviyo is heavily focused on e-commerce and customer lifecycle marketing.
Its current Free plan includes:
Up to 250 active profiles
500 email sends per month
$5 of mobile messaging
Reporting
Segmentation
Automation
Klaviyo integrates closely with customer and purchase data, making it especially relevant for e-commerce brands.
Pricing increases as the number of active profiles and message volume increase.
HubSpot combines email marketing with:
CRM
Forms
Sales tools
Automation
Customer data
Reporting
Its current Marketing Hub offers a Free tier.
Paid tiers can increase substantially as businesses require more advanced automation, reporting, and marketing functionality.
HubSpot is often relevant when email is only one part of a larger CRM and sales workflow.
Email marketing can be started with very little upfront software cost.
Requirement | Example | Starting cost |
|---|---|---|
Website or landing page | Existing site | Already owned possible |
Signup form | Email platform | Free options available |
Email platform | Mailchimp / Klaviyo / HubSpot | Free options available |
Business domain | Existing domain | Already owned possible |
Analytics | Platform reporting | Included |
DNS authentication | Domain settings | No additional software cost |
A small business can therefore begin building an email list without purchasing an expensive marketing stack.
Costs grow primarily with:
Contact count
Send volume
SMS usage
Automation complexity
Advanced reporting
Decide what email should accomplish.
Examples:
Increase repeat purchases
Convert free users
Drive traffic to content
Promote launches
Retain customers
Do not start by sending newsletters without knowing why the emails exist.
Consider:
Contact count
E-commerce integration
Automation
CRM requirements
Pricing
Reporting
SMS needs
Do not choose a platform only because it has the most features.
Set up:
SPF
DKIM
DMARC when appropriate
Verify the platform's sending-domain configuration before scaling volume.
Add subscription opportunities to appropriate areas such as:
Homepage
Blog
Checkout
Landing pages
Product pages
Explain what subscribers will receive.
A new subscriber should receive a useful introduction.
For example:
Email 1 — Welcome Email 2 — Best resource or product education Email 3 — Customer problem and solution Email 4 — Offer or next action
The exact sequence depends on the business.
Separate major groups such as:
Prospects
Customers
Active customers
Inactive subscribers
Avoid sending every message to everyone.
Decide:
Newsletter frequency
Promotional frequency
Automation triggers
Consistency can help establish expectations.
Sending far more frequently than subscribers expect can increase unsubscribes and spam complaints.
Check:
Subject
Links
Buttons
Images
Mobile layout
Personalization
Unsubscribe
Tracking
Send test emails to several major email clients if possible.
Review:
Delivery
Clicks
Conversions
Unsubscribes
Spam complaints
Revenue
Do not judge every campaign from one metric.
Review which automated emails:
Produce revenue
Have high drop-off
Receive low clicks
Generate complaints
Update poor-performing sequences over time.
A practical email marketing stack may include:
Email platform: Mailchimp, Klaviyo, HubSpot, or another ESP
Website: Shopify, WordPress, Webflow, custom site, or SaaS application
Forms: Built-in email platform forms or website forms
CRM: HubSpot or another customer database
Analytics: Google Analytics and platform reporting
E-commerce: Shopify or another store platform
Authentication: SPF, DKIM, DMARC
Deliverability monitoring: Google Postmaster Tools where relevant
A small newsletter may only need an email platform and signup form.
A mature e-commerce program may connect the store, customer database, analytics, SMS, product catalog, and behavioral events.
Unwanted email can generate spam complaints and legal problems.
Use clear signup and consent processes appropriate to the market.
Purchased lists frequently contain people who did not request messages.
This can damage sender reputation and deliverability.
Missing SPF, DKIM, or DMARC configuration can increase authentication and delivery problems.
Authentication should be configured before large-scale campaigns.
Google currently requires bulk senders to keep spam rates below its threshold.
Repeated complaints can damage the sending domain's reputation.
Increasing volume suddenly can trigger delivery problems.
Google recommends gradually increasing volume and sending at a consistent rate.
Keeping large numbers of permanently inactive contacts can:
Increase platform costs
Reduce engagement
Make list metrics less useful
Create a re-engagement process and consider removing contacts who no longer want the emails.
Many email platforms charge according to:
Contacts
Active profiles
Send volume
A rapidly growing list can significantly increase monthly software costs.
Review pricing before migrating large lists.
CAN-SPAM applies in the United States, but other countries and regions have different privacy and electronic-marketing laws.
Businesses should understand the rules applicable to their recipients.
Email marketing uses email to communicate with subscribers and customers for purposes such as promotion, education, retention, onboarding, and relationship building.
It can be started with free email-platform plans.
Costs increase as the subscriber list, message volume, automation needs, and feature requirements increase.
Not strictly, but a website or landing page makes it easier to collect subscribers, explain the offer, and convert email traffic.
It is generally a poor strategy.
Purchased lists can create consent, deliverability, platform, and spam-complaint problems.
Building a permission-based list is more sustainable.
An email sequence is a predefined series of emails sent over time or triggered by user behavior.
Examples include welcome, onboarding, abandoned-cart, and re-engagement sequences.
Automation sends emails based on events or conditions without manually sending each message.
Examples include signup, purchase, inactivity, and cart abandonment.
Deliverability refers to whether sent messages successfully reach recipients and avoid being rejected or filtered as spam.
They are domain-authentication technologies used to verify that messages are authorized and to reduce spoofing and phishing.
Google currently requires SPF or DKIM for all senders to Gmail accounts and stronger authentication requirements for qualifying bulk senders.
Large senders should configure SPF, DKIM, and DMARC correctly.
Google currently considers a sender sending close to 5,000 or more messages to personal Gmail accounts within a 24-hour period a bulk sender.
Messages from the same primary domain count together.
This can violate platform rules and applicable law.
Google requires qualifying bulk marketing senders to provide one-click unsubscribe and a clearly visible unsubscribe link.
The best choice depends on the business.
Mailchimp works well for general email marketing, Klaviyo is strongly focused on e-commerce and customer data, while HubSpot is useful when email needs to integrate deeply with CRM and sales workflows.
Email remains useful because businesses can communicate directly with subscribers and automate lifecycle messages.
Results depend on list quality, relevance, offer, deliverability, and execution rather than simply sending more messages.
Google — Email Sender Guidelines — Current Gmail sender authentication, spam-rate, DNS, TLS, DMARC, and unsubscribe requirements.
Google — Email Sender Guidelines FAQ — Current Gmail definition of bulk senders and enforcement details for senders around 5,000 messages per day.
Google — Bulk Email Best Practices — Official guidance covering consent, unsubscribe, sending frequency, deceptive content, and bulk-email practices.
FTC — Complying with the CAN-SPAM Act — Official U.S. guidance for commercial email compliance.
Mailchimp — Marketing Pricing — Current Free, Standard, Premium, contact, and email-send pricing information.
Klaviyo — Pricing — Current Free plan limits, email sends, active profiles, reporting, segmentation, and messaging allowances.
Klaviyo — How Billing Works — Official explanation of Klaviyo profile, email, messaging, and product billing.
HubSpot — Marketing Hub — Current Free, Starter, Professional, and Enterprise marketing-platform pricing and email automation features.
HubSpot — Customer Platform Pricing — Current HubSpot platform pricing and plan structure.
Canonical Markdown
Email marketing is the use of email to communicate with subscribers, customers, and prospects for purposes such as sales, product education, retention, announcements, and relationship building. Businesses can use email marketing to promote products, recover abandoned carts, onboard new users, send newsletters, announce launches, educate customers, and automatically follow up based on user behavior. Unlike social media, an email list is typically built around direct subscriber relationships rather than dependence on a public-feed algorithm. # Quick Facts | Item | Details || ------------------------------------ | ----------------------------------------------------------------------- || Main goal | Generate sales, retention, engagement, and repeat visits || Common uses | Newsletters, promotions, onboarding, abandoned carts, product education || Coding required | No for most campaigns || Common tools | Mailchimp, Klaviyo, HubSpot || Free tools available | Yes || Mailchimp starting paid plan example | From about $20/month || Klaviyo free plan | Up to 250 profiles and 500 emails/month || Gmail bulk-sender threshold | About 5,000 messages/day to personal Gmail accounts || Key technical requirements | SPF, DKIM, DMARC, unsubscribe support || Difficulty | Beginner to advanced | # How Email Marketing Works Email marketing usually follows a simple process: Visitor joins list → Subscriber receives emails → Emails educate or promote → Subscriber clicks → Subscriber purchases or takes another action The important part is not simply sending more email. A useful email program depends on: - Permission- Relevant content- Segmentation- Timing- Deliverability- Clear calls to action- Measurement # Main Types of Email Marketing ## Newsletter A newsletter is sent regularly to subscribers. Common content includes: - Industry news- New articles- Product updates- Company updates- Curated resources- Educational content Newsletters are useful for staying in contact with an audience even when there is no immediate promotion. ## Promotional Email Promotional emails are designed to generate a sale or another direct action. Examples include: - Product launch- Limited-time discount- Seasonal sale- New collection- Event promotion- Upgrade offer Promotional emails should clearly explain: - Offer- Benefit- Deadline if applicable- Call to action ## Welcome Email A welcome email is sent after someone subscribes or creates an account. It may include: - Introduction- What to expect- Useful resources- Product explanation- Discount- Next step Welcome emails are often part of an automated sequence rather than a single message. ## Onboarding Sequence Onboarding emails help new users understand a product or service. A sequence might include: - Account setup- Core feature introduction- Tutorial- Use case- Success example- Upgrade invitation This is particularly common for SaaS businesses. ## Abandoned Cart Email E-commerce businesses can send reminders when a customer adds a product to a cart but does not complete the purchase. A sequence may include: - Reminder- Product image- Benefits- Reviews- Discount if appropriate The exact strategy should reflect the store's economics rather than automatically offering a discount. ## Post-Purchase Email Post-purchase emails can include: - Order confirmation- Usage instructions- Product education- Review request- Cross-sell- Reorder reminder These messages can improve customer experience and repeat purchases. ## Re-Engagement Email Re-engagement campaigns target subscribers who have stopped opening or clicking emails. Possible messages include: - Preference update- New offer- Content reminder- Subscription confirmation Inactive subscribers may eventually be removed from active marketing lists to protect deliverability and reduce software costs. # Building an Email List Email marketing begins with permission-based list growth. Common methods include: - Website signup form- Newsletter signup- Lead magnet- Free tool- Discount- Account creation- Webinar registration- Checkout opt-in- Event registration Avoid purchasing random email lists. Purchased lists can create: - Spam complaints- Poor engagement- Deliverability problems- Legal risk- Platform-account problems A smaller engaged list can be more valuable than a large list of people who never asked to receive messages. # Lead Magnets A lead magnet gives visitors a reason to subscribe. Examples include: - Checklist- Template- Guide- Calculator- Free course- Report- Industry data- Coupon- Free trial The lead magnet should attract the type of subscriber the business actually wants. A broad giveaway may generate many subscribers who never become customers. # Segmentation Segmentation divides subscribers into groups. Possible segments include: - New subscribers- Customers- Non-customers- High-value customers- Recent purchasers- Inactive users- Product interest- Geographic location- Engagement level Segmentation allows different users to receive different messages. For example: A customer who already purchased a product should not necessarily receive the same introductory campaign as a first-time visitor. # Personalization Personalization can include more than inserting a first name. Useful personalization may be based on: - Previous purchases- Viewed products- Account activity- Location- Subscription type- Customer lifecycle stage The goal is to send more relevant messages rather than simply adding personal data for appearance. # Email Automation Automation sends emails when a specific event happens. Common triggers include: - Subscription- Account creation- Purchase- Abandoned cart- Trial expiration- Product usage- Inactivity- Birthday- Renewal date For example: New signup → Welcome email → Product tutorial → Use-case email → Upgrade offer Automation is valuable because the sequence continues without manually sending each email. # Campaign vs Automation A campaign is usually sent at a specific time to a selected audience. Examples: - Friday newsletter- Black Friday promotion- Product launch An automation is triggered by user behavior or a lifecycle event. Examples: - Welcome sequence- Cart abandonment- Re-engagement- Post-purchase sequence Most mature email programs use both. # Writing an Email A marketing email generally includes: - Sender name- Subject line- Preview text- Main message- Call to action- Unsubscribe option The email should make the intended action clear. Avoid unnecessary complexity. A simple email with one clear message can perform better than a visually complex message containing many unrelated offers. # Subject Lines Subject lines influence whether subscribers choose to open an email. Useful approaches include: - Clear benefit- Specific topic- Curiosity- Urgency when genuine- Relevant announcement Avoid deceptive subject lines. The subject should accurately represent the message. # Calls to Action A call to action tells the subscriber what to do next. Examples: - Shop now- Read the guide- Start free trial- View pricing- Complete setup- Book a demo Do not overload every email with many competing actions unless the newsletter format requires several destinations. # Email Design Marketing emails can be: - Plain text- Lightly formatted- Fully designed HTML The right style depends on the business. E-commerce brands may benefit from product images and visual layouts. Founder newsletters or B2B messages may intentionally look simpler and more personal. Always check mobile readability. # Mobile Optimization Many users read email on phones. Check: - Text size- Button size- Image width- Spacing- Subject length- Load speed- Layout Test the email before sending it to the full list. # Deliverability Deliverability refers to whether emails successfully reach recipients rather than being rejected or filtered. Important factors include: - Sender reputation- Authentication- Spam complaints- Engagement- Sending behavior- List quality- Unsubscribe handling A technically successful send does not guarantee that the message reaches the inbox. # SPF SPF allows a domain to specify which servers are authorized to send email on its behalf. It helps receiving mail systems identify unauthorized senders. # DKIM DKIM attaches a cryptographic signature to outgoing email. Receiving providers can use the signature to confirm that the message was authorized by the sending domain and was not altered in transit. # DMARC DMARC builds on SPF and DKIM and provides instructions for how receiving providers should handle messages that fail authentication checks. It also supports reporting. Businesses sending significant email volume should understand all three technologies. # Gmail Sender Requirements Google currently requires all senders sending messages to Gmail accounts to follow baseline authentication and delivery requirements. For senders sending around **5,000 or more messages per day to personal Gmail accounts**, additional requirements apply. These include: - SPF- DKIM- DMARC- TLS- Valid DNS configuration- Low spam rates- Domain alignment- One-click unsubscribe for marketing and subscribed messages- A visible unsubscribe link Google currently recommends keeping spam rates reported in Postmaster Tools below **0.3%**. Once Google classifies a sender as a bulk sender, that classification does not currently expire. # Unsubscribe Marketing email should provide an easy way to stop receiving messages. Do not hide or intentionally complicate the unsubscribe process. Google requires qualifying bulk marketing senders to provide one-click unsubscribe. Legal requirements also vary by country. # CAN-SPAM In the United States, commercial email is regulated by the CAN-SPAM Act. Businesses sending promotional email should review current FTC requirements. Important areas include: - Accurate sender information- Non-deceptive subject lines- Clear identification where required- Physical postal address- Opt-out mechanism- Honoring unsubscribe requests Email regulations vary internationally, so businesses sending across markets should check applicable local laws. # Measuring Email Marketing Important metrics can include: - Delivery rate- Bounce rate- Open rate- Click rate- Unsubscribe rate- Spam complaint rate- Conversion rate- Revenue- Revenue per recipient Do not evaluate an email program using only open rate. Privacy features and email-client behavior can make opens less reliable than direct business outcomes such as clicks and purchases. # Click-Through Rate Click-through rate measures how many recipients clicked a link. A high click rate can indicate: - Relevant offer- Strong call to action- Good audience targeting- Useful content However, the final goal is often conversion rather than the click itself. # Conversion Rate A conversion occurs when the email contributes to the desired action. Examples: - Purchase- Demo booking- Trial signup- Registration- Upgrade A campaign with fewer clicks but more purchases may be more valuable than one with many clicks but little revenue. # Revenue Attribution E-commerce and marketing platforms can attribute purchases to email campaigns and automations. Attribution models vary. Do not assume reported revenue means the email was the only reason the customer purchased. Use the metric as a directional tool rather than an absolute representation of causality. # Email Marketing Tools ## Mailchimp Mailchimp provides: - Email campaigns- Automation- Templates- Signup forms- Segmentation- Reporting Its current pricing page lists: - Free options for small contact lists- Standard starting around $20/month after trial- Premium starting around $350/month in the current displayed configuration Pricing depends on contact count and sending limits. Mailchimp can be useful for: - Newsletters- Small businesses- General email campaigns- Basic automation ## Klaviyo Klaviyo is heavily focused on e-commerce and customer lifecycle marketing. Its current Free plan includes: - Up to 250 active profiles- 500 email sends per month- $5 of mobile messaging- Reporting- Segmentation- Automation Klaviyo integrates closely with customer and purchase data, making it especially relevant for e-commerce brands. Pricing increases as the number of active profiles and message volume increase. ## HubSpot HubSpot combines email marketing with: - CRM- Forms- Sales tools- Automation- Customer data- Reporting Its current Marketing Hub offers a Free tier. Paid tiers can increase substantially as businesses require more advanced automation, reporting, and marketing functionality. HubSpot is often relevant when email is only one part of a larger CRM and sales workflow. # Minimum Entry Setup Email marketing can be started with very little upfront software cost. | Requirement | Example | Starting cost || ----------------------- | ----------------------------- | ---------------------------: || Website or landing page | Existing site | Already owned possible || Signup form | Email platform | Free options available || Email platform | Mailchimp / Klaviyo / HubSpot | Free options available || Business domain | Existing domain | Already owned possible || Analytics | Platform reporting | Included || DNS authentication | Domain settings | No additional software cost | A small business can therefore begin building an email list without purchasing an expensive marketing stack. Costs grow primarily with: - Contact count- Send volume- SMS usage- Automation complexity- Advanced reporting # Practical Workflow ## 1. Define the Goal Decide what email should accomplish. Examples: - Increase repeat purchases- Convert free users- Drive traffic to content- Promote launches- Retain customers Do not start by sending newsletters without knowing why the emails exist. ## 2. Choose a Platform Consider: - Contact count- E-commerce integration- Automation- CRM requirements- Pricing- Reporting- SMS needs Do not choose a platform only because it has the most features. ## 3. Authenticate the Domain Set up: - SPF- DKIM- DMARC when appropriate Verify the platform's sending-domain configuration before scaling volume. ## 4. Create Signup Points Add subscription opportunities to appropriate areas such as: - Homepage- Blog- Checkout- Landing pages- Product pages Explain what subscribers will receive. ## 5. Build the Welcome Sequence A new subscriber should receive a useful introduction. For example: Email 1 — WelcomeEmail 2 — Best resource or product educationEmail 3 — Customer problem and solutionEmail 4 — Offer or next action The exact sequence depends on the business. ## 6. Segment Subscribers Separate major groups such as: - Prospects- Customers- Active customers- Inactive subscribers Avoid sending every message to everyone. ## 7. Create a Sending Schedule Decide: - Newsletter frequency- Promotional frequency- Automation triggers Consistency can help establish expectations. Sending far more frequently than subscribers expect can increase unsubscribes and spam complaints. ## 8. Test Before Sending Check: - Subject- Links- Buttons- Images- Mobile layout- Personalization- Unsubscribe- Tracking Send test emails to several major email clients if possible. ## 9. Send and Monitor Review: - Delivery- Clicks- Conversions- Unsubscribes- Spam complaints- Revenue Do not judge every campaign from one metric. ## 10. Improve Automation Review which automated emails: - Produce revenue- Have high drop-off- Receive low clicks- Generate complaints Update poor-performing sequences over time. # Common Technology Stack A practical email marketing stack may include: - **Email platform:** Mailchimp, Klaviyo, HubSpot, or another ESP- **Website:** Shopify, WordPress, Webflow, custom site, or SaaS application- **Forms:** Built-in email platform forms or website forms- **CRM:** HubSpot or another customer database- **Analytics:** Google Analytics and platform reporting- **E-commerce:** Shopify or another store platform- **Authentication:** SPF, DKIM, DMARC- **Deliverability monitoring:** Google Postmaster Tools where relevant A small newsletter may only need an email platform and signup form. A mature e-commerce program may connect the store, customer database, analytics, SMS, product catalog, and behavioral events. # Risks / Things to Know ## Sending Without Permission Unwanted email can generate spam complaints and legal problems. Use clear signup and consent processes appropriate to the market. ## Buying Email Lists Purchased lists frequently contain people who did not request messages. This can damage sender reputation and deliverability. ## Poor Authentication Missing SPF, DKIM, or DMARC configuration can increase authentication and delivery problems. Authentication should be configured before large-scale campaigns. ## High Spam Complaints Google currently requires bulk senders to keep spam rates below its threshold. Repeated complaints can damage the sending domain's reputation. ## Sending Too Much Increasing volume suddenly can trigger delivery problems. Google recommends gradually increasing volume and sending at a consistent rate. ## Ignoring Inactive Subscribers Keeping large numbers of permanently inactive contacts can: - Increase platform costs- Reduce engagement- Make list metrics less useful Create a re-engagement process and consider removing contacts who no longer want the emails. ## Platform Costs Scale with the List Many email platforms charge according to: - Contacts- Active profiles- Send volume A rapidly growing list can significantly increase monthly software costs. Review pricing before migrating large lists. ## Legal Requirements Differ by Country CAN-SPAM applies in the United States, but other countries and regions have different privacy and electronic-marketing laws. Businesses should understand the rules applicable to their recipients. # Frequently Asked Questions ## What is email marketing? Email marketing uses email to communicate with subscribers and customers for purposes such as promotion, education, retention, onboarding, and relationship building. ## Is email marketing free? It can be started with free email-platform plans. Costs increase as the subscriber list, message volume, automation needs, and feature requirements increase. ## Do I need a website? Not strictly, but a website or landing page makes it easier to collect subscribers, explain the offer, and convert email traffic. ## Can I buy an email list? It is generally a poor strategy. Purchased lists can create consent, deliverability, platform, and spam-complaint problems. Building a permission-based list is more sustainable. ## What is an email sequence? An email sequence is a predefined series of emails sent over time or triggered by user behavior. Examples include welcome, onboarding, abandoned-cart, and re-engagement sequences. ## What is an email automation? Automation sends emails based on events or conditions without manually sending each message. Examples include signup, purchase, inactivity, and cart abandonment. ## What is email deliverability? Deliverability refers to whether sent messages successfully reach recipients and avoid being rejected or filtered as spam. ## What are SPF, DKIM, and DMARC? They are domain-authentication technologies used to verify that messages are authorized and to reduce spoofing and phishing. ## Do I need SPF, DKIM, and DMARC? Google currently requires SPF or DKIM for all senders to Gmail accounts and stronger authentication requirements for qualifying bulk senders. Large senders should configure SPF, DKIM, and DMARC correctly. ## What counts as a bulk sender in Gmail? Google currently considers a sender sending close to 5,000 or more messages to personal Gmail accounts within a 24-hour period a bulk sender. Messages from the same primary domain count together. ## Can I send marketing emails without an unsubscribe link? This can violate platform rules and applicable law. Google requires qualifying bulk marketing senders to provide one-click unsubscribe and a clearly visible unsubscribe link. ## Which email marketing tool should I use? The best choice depends on the business. Mailchimp works well for general email marketing, Klaviyo is strongly focused on e-commerce and customer data, while HubSpot is useful when email needs to integrate deeply with CRM and sales workflows. ## Is email marketing still effective? Email remains useful because businesses can communicate directly with subscribers and automate lifecycle messages. Results depend on list quality, relevance, offer, deliverability, and execution rather than simply sending more messages. # Sources - [Google — Email Sender Guidelines](https://support.google.com/mail/answer/81126) — Current Gmail sender authentication, spam-rate, DNS, TLS, DMARC, and unsubscribe requirements.- [Google — Email Sender Guidelines FAQ](https://support.google.com/mail/answer/14229414) — Current Gmail definition of bulk senders and enforcement details for senders around 5,000 messages per day.- [Google — Bulk Email Best Practices](https://support.google.com/mail/answer/10979322) — Official guidance covering consent, unsubscribe, sending frequency, deceptive content, and bulk-email practices.- [FTC — Complying with the CAN-SPAM Act](https://www.ftc.gov/media/71413) — Official U.S. guidance for commercial email compliance.- [Mailchimp — Marketing Pricing](https://mailchimp.com/pricing/marketing/) — Current Free, Standard, Premium, contact, and email-send pricing information.- [Klaviyo — Pricing](https://www.klaviyo.com/pricing) — Current Free plan limits, email sends, active profiles, reporting, segmentation, and messaging allowances.- [Klaviyo — How Billing Works](https://help.klaviyo.com/hc/en-us/articles/115000976672) — Official explanation of Klaviyo profile, email, messaging, and product billing.- [HubSpot — Marketing Hub](https://www.hubspot.com/products/marketing) — Current Free, Starter, Professional, and Enterprise marketing-platform pricing and email automation features.- [HubSpot — Customer Platform Pricing](https://www.hubspot.com/pricing/suite) — Current HubSpot platform pricing and plan structure.