Email marketing remains the highest-ROI digital channel available to businesses, and the numbers back that up clearly. Email marketing campaigns have an average ROI of 36 times, meaning businesses earn $36 for every dollar they spend. Yet a significant gap exists between businesses that extract that value and those that do not. Knowing how to use email marketing correctly, from list building through automation and deliverability, is what separates the two groups.
This guide covers every core element of an effective email marketing program, with specific steps and sourced data so you can build or improve your strategy with confidence.
Key Takeaways
For every $1 spent on email marketing, businesses see an average return of $36, a 3,600% ROI.
Despite representing only 2% of total send volume, automated messages generated 37% of all email-attributed sales in 2024.
Marketers using advanced segmentation have seen a 760% increase in email revenue from segmented campaigns.
Senders of more than 5,000 daily emails to Gmail or Yahoo must authenticate using DKIM, SPF, and DMARC; allow one-click unsubscribes; and keep spam complaint rates under 0.3%.
Brands that regularly A/B test their emails achieve 83% higher ROI than those that never test.
What Email Marketing Actually Is (and Why It Still Works)
Email marketing is the practice of sending targeted, permission-based messages to a list of subscribers to build relationships, drive conversions, and retain customers. Unlike paid social or search, you own the channel. Email marketing can be one of the best marketing investments you can make because you are in control: you manage your list of subscribers, and you do not have to depend on search engines or social media algorithms to get the word out.
The scale of the opportunity is significant. Global email users are forecast to increase from 4.48 billion in 2024 to 4.97 billion by 2028, reaching over 60% of the global population. That reach, combined with its direct line to the inbox, explains why 41% of marketers say email is their most effective channel, well ahead of social media and paid search at 16%.
52% of consumers made a purchase directly from an email they received, making email the most effective channel for driving sales, beating social media posts by 13% and social media ads by 11%.
Email marketing remains the highest-ROI digital channel available to businesses, and the numbers back that up clearly. Email marketing campaigns have an average ROI of 36 times, meaning businesses earn $36 for every dollar they spend. Yet a significant gap exists between businesses that extract that value and those that do not. Knowing how to use email marketing correctly, from list building through automation and deliverability, is what separates the two groups.
This guide covers every core element of an effective email marketing program, with specific steps and sourced data so you can build or improve your strategy with confidence.
Key Takeaways
For every $1 spent on email marketing, businesses see an average return of $36, a 3,600% ROI.
Despite representing only 2% of total send volume, automated messages generated 37% of all email-attributed sales in 2024.
Marketers using advanced segmentation have seen a 760% increase in email revenue from segmented campaigns.
Senders of more than 5,000 daily emails to Gmail or Yahoo must authenticate using DKIM, SPF, and DMARC; allow one-click unsubscribes; and keep spam complaint rates under 0.3%.
Brands that regularly A/B test their emails achieve 83% higher ROI than those that never test.
What Email Marketing Actually Is (and Why It Still Works)
Email marketing is the practice of sending targeted, permission-based messages to a list of subscribers to build relationships, drive conversions, and retain customers. Unlike paid social or search, you own the channel. Email marketing can be one of the best marketing investments you can make because you are in control: you manage your list of subscribers, and you do not have to depend on search engines or social media algorithms to get the word out.
The scale of the opportunity is significant. Global email users are forecast to increase from 4.48 billion in 2024 to 4.97 billion by 2028, reaching over 60% of the global population. That reach, combined with its direct line to the inbox, explains why 41% of marketers say email is their most effective channel, well ahead of social media and paid search at 16%.
52% of consumers made a purchase directly from an email they received, making email the most effective channel for driving sales, beating social media posts by 13% and social media ads by 11%.
Step 1: Build a Permission-Based Email List
No list, no email marketing. And not just any list: a permission-based list of people who actually want to hear from you.
Building a quality email marketing list takes time, patience, and a verifiable signup process. Getting people's permission to send marketing campaigns not only complies with anti-spam regulations, but it also ensures you're cultivating an audience that's loyal to your brand.
Practical list-building tactics:
Place opt-in forms on high-traffic pages, blog posts, and landing pages
Use lead magnets (guides, templates, discounts, webinars) to incentivize sign-ups
Use a double opt-in process, which usually includes a signup form and an automated confirmation email, so subscribers can confirm their subscription.
Run social media promotions that direct users to an email sign-up page
Staying off email spam lists requires working with a reputable email software platform and ensuring every person on your email list has signed up and wants to receive your messages.
Once your list starts growing, keep it clean. Remove inactive subscribers regularly. High bounce rates and invalid email addresses can make your email marketing campaigns hit spam thresholds.
Your email service provider (ESP) handles sending, automation, list management, analytics, and deliverability. The right choice depends on your list size, technical requirements, budget, and the types of campaigns you plan to run.
Key features to evaluate in any platform:
Automation and triggered email support
List segmentation and tagging
A/B testing functionality
Deliverability tools and reporting
Integration with your CRM, ecommerce platform, or website
Compliance features (DKIM/SPF setup, one-click unsubscribe)
Popular options include Mailchimp, Klaviyo, ActiveCampaign, ConvertKit, and HubSpot. Each has different strengths. For example, Klaviyo is built for ecommerce with strong behavioral triggers, while HubSpot suits teams that want tight CRM integration.
Step 1: Build a Permission-Based Email List
No list, no email marketing. And not just any list: a permission-based list of people who actually want to hear from you.
Building a quality email marketing list takes time, patience, and a verifiable signup process. Getting people's permission to send marketing campaigns not only complies with anti-spam regulations, but it also ensures you're cultivating an audience that's loyal to your brand.
Practical list-building tactics:
Place opt-in forms on high-traffic pages, blog posts, and landing pages
Use lead magnets (guides, templates, discounts, webinars) to incentivize sign-ups
Use a double opt-in process, which usually includes a signup form and an automated confirmation email, so subscribers can confirm their subscription.
Run social media promotions that direct users to an email sign-up page
Staying off email spam lists requires working with a reputable email software platform and ensuring every person on your email list has signed up and wants to receive your messages.
Once your list starts growing, keep it clean. Remove inactive subscribers regularly. High bounce rates and invalid email addresses can make your email marketing campaigns hit spam thresholds.
Your email service provider (ESP) handles sending, automation, list management, analytics, and deliverability. The right choice depends on your list size, technical requirements, budget, and the types of campaigns you plan to run.
Key features to evaluate in any platform:
Automation and triggered email support
List segmentation and tagging
A/B testing functionality
Deliverability tools and reporting
Integration with your CRM, ecommerce platform, or website
Compliance features (DKIM/SPF setup, one-click unsubscribe)
Popular options include Mailchimp, Klaviyo, ActiveCampaign, ConvertKit, and HubSpot. Each has different strengths. For example, Klaviyo is built for ecommerce with strong behavioral triggers, while HubSpot suits teams that want tight CRM integration.
Sending the same email to your entire list is one of the most common and costly mistakes in email marketing. Emails with personalized content generate up to 6 times higher transaction rates compared to non-personalized campaigns.
Segmentation divides your list into groups based on shared characteristics or behaviors, so each group receives messages that are relevant to them specifically.
Email marketers can create different customer segments based on recipients' demographics, lifestyle, location, website activity, job title, psychographics, and other factors.
Common segmentation criteria include:
Purchase history: what they bought, how recently, how often
Engagement level: active openers vs. inactive subscribers
Lead source: how they joined your list
Lifecycle stage: new subscriber, repeat buyer, at-risk of churning
Geography: useful for local promotions or time-zone-based sending
Marketers have found a 760% increase in email revenue from segmented campaigns. That figure alone makes segmentation one of the highest-leverage actions you can take.
Great email copy starts before the body: it starts with the subject line.
Emails with personalized subject lines can increase open rates by 26%. Once a message lands in an inbox, the subject line has to entice the recipient to open it, and most marketers agree that subject lines should be roughly 50 characters for maximum impact.
Beyond the subject line, here is what drives performance in the email body:
Sending the same email to your entire list is one of the most common and costly mistakes in email marketing. Emails with personalized content generate up to 6 times higher transaction rates compared to non-personalized campaigns.
Segmentation divides your list into groups based on shared characteristics or behaviors, so each group receives messages that are relevant to them specifically.
Email marketers can create different customer segments based on recipients' demographics, lifestyle, location, website activity, job title, psychographics, and other factors.
Common segmentation criteria include:
Purchase history: what they bought, how recently, how often
Engagement level: active openers vs. inactive subscribers
Lead source: how they joined your list
Lifecycle stage: new subscriber, repeat buyer, at-risk of churning
Geography: useful for local promotions or time-zone-based sending
Marketers have found a 760% increase in email revenue from segmented campaigns. That figure alone makes segmentation one of the highest-leverage actions you can take.
Great email copy starts before the body: it starts with the subject line.
Emails with personalized subject lines can increase open rates by 26%. Once a message lands in an inbox, the subject line has to entice the recipient to open it, and most marketers agree that subject lines should be roughly 50 characters for maximum impact.
Beyond the subject line, here is what drives performance in the email body:
One clear goal per email. An important best practice is to have a strategic purpose for every email campaign. Once opened, your email has a job to do, whether that is to inform, entertain, or entice a purchase. That goal likely involves clicking through to a landing page, so include a call to action (CTA) that stands out visually and clearly explains the required action.
Relevant content. Match what you send to what each segment actually cares about.
Mobile-first design. 50% of people will delete an email if it is not optimized for mobile. Use single-column layouts, large tap targets, and concise copy.
Consistent sender name. Subscribers open emails from senders they recognize. Use a real name or a recognizable brand name, not a generic "noreply@" address.
For a deep look at what makes subject lines perform, check our post on email subject line best practices that boost open rates by 27%.
Step 5: Set Up Automation
Automation is where email marketing delivers its highest returns, and the data here is decisive.
Email automations deliver 30 times more revenue per recipient than one-off promotional campaigns. The average return per recipient for campaigns sits at $0.11, while automated flows earn $1.94 per recipient.
In 2024, automated emails outperformed scheduled ones by 52% in opens, 332% in clicks, and 2,361% in conversions.
Core automations every business should have:
Welcome series: Sent immediately when someone joins your list. Sets expectations and builds the relationship from day one. For guidance, see our piece on welcome email sequence best practices.
Abandoned cart: Reminds shoppers of items left in their cart. Abandoned cart email campaigns have an open rate of 50.50%.
Post-purchase sequence: Confirms orders, sets delivery expectations, and opens the door to reviews and upsells.
Re-engagement campaign: Targets subscribers who have not opened or clicked in 60 to 90 days. Gives them a reason to stay engaged, or removes them cleanly from your list.
Browse abandonment: Triggered when a user views a product page but does not add to cart.
Welcome emails, abandoned cart, and browse abandonment campaigns accounted for 87% of automated orders in 2024.
Step 6: Protect Your Deliverability
A perfectly written email is worthless if it lands in spam. 1 in 6 marketing emails never reaches the inbox, getting filtered to spam or blocked outright.
In February 2024, Google and Yahoo implemented mandatory requirements for bulk senders. If you send more than 5,000 daily emails to Google and Yahoo addresses, you must authenticate your emails using DKIM, SPF, and DMARC; allow people to unsubscribe by clicking just one link and honor unsubscribes within two days; and maintain a spam complaint rate under 0.3%.
These are the non-negotiable technical foundations:
One clear goal per email. An important best practice is to have a strategic purpose for every email campaign. Once opened, your email has a job to do, whether that is to inform, entertain, or entice a purchase. That goal likely involves clicking through to a landing page, so include a call to action (CTA) that stands out visually and clearly explains the required action.
Relevant content. Match what you send to what each segment actually cares about.
Mobile-first design. 50% of people will delete an email if it is not optimized for mobile. Use single-column layouts, large tap targets, and concise copy.
Consistent sender name. Subscribers open emails from senders they recognize. Use a real name or a recognizable brand name, not a generic "noreply@" address.
For a deep look at what makes subject lines perform, check our post on email subject line best practices that boost open rates by 27%.
Step 5: Set Up Automation
Automation is where email marketing delivers its highest returns, and the data here is decisive.
Email automations deliver 30 times more revenue per recipient than one-off promotional campaigns. The average return per recipient for campaigns sits at $0.11, while automated flows earn $1.94 per recipient.
In 2024, automated emails outperformed scheduled ones by 52% in opens, 332% in clicks, and 2,361% in conversions.
Core automations every business should have:
Welcome series: Sent immediately when someone joins your list. Sets expectations and builds the relationship from day one. For guidance, see our piece on welcome email sequence best practices.
Abandoned cart: Reminds shoppers of items left in their cart. Abandoned cart email campaigns have an open rate of 50.50%.
Post-purchase sequence: Confirms orders, sets delivery expectations, and opens the door to reviews and upsells.
Re-engagement campaign: Targets subscribers who have not opened or clicked in 60 to 90 days. Gives them a reason to stay engaged, or removes them cleanly from your list.
Browse abandonment: Triggered when a user views a product page but does not add to cart.
Welcome emails, abandoned cart, and browse abandonment campaigns accounted for 87% of automated orders in 2024.
Step 6: Protect Your Deliverability
A perfectly written email is worthless if it lands in spam. 1 in 6 marketing emails never reaches the inbox, getting filtered to spam or blocked outright.
In February 2024, Google and Yahoo implemented mandatory requirements for bulk senders. If you send more than 5,000 daily emails to Google and Yahoo addresses, you must authenticate your emails using DKIM, SPF, and DMARC; allow people to unsubscribe by clicking just one link and honor unsubscribes within two days; and maintain a spam complaint rate under 0.3%.
These are the non-negotiable technical foundations:
SPF (Sender Policy Framework): Specifies which IP addresses are authorized to send email from your domain
DKIM (DomainKeys Identified Mail): Adds a digital signature to your emails so receiving servers can verify authenticity
DMARC (Domain-based Message Authentication, Reporting, and Conformance): Tells receiving servers what to do when an email fails SPF or DKIM checks
Beyond authentication, protect your sender reputation by:
Using double opt-in to reduce spam trap hits
Cleaning your list regularly by removing invalid or bouncing addresses and sunsetting inactive users, while monitoring bounce rates and complaint trends to spot issues early.
Keeping your spam complaint rate as close to 0.1% as possible. Google says bulk senders must keep their reported spam rate below 0.10% and avoid ever reaching 0.30% or higher.
Step 7: Measure What Matters and Optimize
Bot-driven phantom engagement has made open rates unreliable, pushing high-performing teams toward revenue per email, list churn, and lifetime value as the metrics that matter.
Metrics worth tracking:
Revenue per email (RPE): The clearest signal of campaign effectiveness
Click-through rate (CTR): Indicates whether your content and CTA are compelling
Conversion rate: Measures whether clicks turned into the desired action
List growth rate: Net new subscribers minus unsubscribes and bounces
Spam complaint rate: Keep this under 0.1% as a consistent target
Unsubscribe rate: The average unsubscribe rate across industries is 0.15%. Sustained spikes above this signal a relevance problem.
Use A/B testing to improve performance over time. Start by deciding what to test. While you may want to check more than one element, it is important to test only one thing at a time. By isolating a single variable, you can more easily understand why one email performed better than another.
Elements worth testing include subject lines, CTA button copy, send time, email length, personalization tokens, and image use.
Start by choosing an email service provider, then build your list using opt-in forms and a lead magnet. Get permission from the people you want to email so they know what they are signing up for, which also gives you concrete proof that they want to receive your marketing communications. Once you have subscribers, set up a welcome sequence, define your audience segments, and send consistently. Do not buy lists.
How often should I send marketing emails?
SPF (Sender Policy Framework): Specifies which IP addresses are authorized to send email from your domain
DKIM (DomainKeys Identified Mail): Adds a digital signature to your emails so receiving servers can verify authenticity
DMARC (Domain-based Message Authentication, Reporting, and Conformance): Tells receiving servers what to do when an email fails SPF or DKIM checks
Beyond authentication, protect your sender reputation by:
Using double opt-in to reduce spam trap hits
Cleaning your list regularly by removing invalid or bouncing addresses and sunsetting inactive users, while monitoring bounce rates and complaint trends to spot issues early.
Keeping your spam complaint rate as close to 0.1% as possible. Google says bulk senders must keep their reported spam rate below 0.10% and avoid ever reaching 0.30% or higher.
Step 7: Measure What Matters and Optimize
Bot-driven phantom engagement has made open rates unreliable, pushing high-performing teams toward revenue per email, list churn, and lifetime value as the metrics that matter.
Metrics worth tracking:
Revenue per email (RPE): The clearest signal of campaign effectiveness
Click-through rate (CTR): Indicates whether your content and CTA are compelling
Conversion rate: Measures whether clicks turned into the desired action
List growth rate: Net new subscribers minus unsubscribes and bounces
Spam complaint rate: Keep this under 0.1% as a consistent target
Unsubscribe rate: The average unsubscribe rate across industries is 0.15%. Sustained spikes above this signal a relevance problem.
Use A/B testing to improve performance over time. Start by deciding what to test. While you may want to check more than one element, it is important to test only one thing at a time. By isolating a single variable, you can more easily understand why one email performed better than another.
Elements worth testing include subject lines, CTA button copy, send time, email length, personalization tokens, and image use.
Start by choosing an email service provider, then build your list using opt-in forms and a lead magnet. Get permission from the people you want to email so they know what they are signing up for, which also gives you concrete proof that they want to receive your marketing communications. Once you have subscribers, set up a welcome sequence, define your audience segments, and send consistently. Do not buy lists.
How often should I send marketing emails?
Frequency depends on your audience and content quality. Brands sending 9 to 16 emails monthly achieve the highest average ROI of any frequency bracket. Start conservatively (one to two times per week), monitor unsubscribe rates and engagement, and adjust from there. Consistency matters more than volume.
What is the average ROI for email marketing?
The average ROI for marketing emails in the US and UK is between 3,600% and 3,800%. Nearly 1 in 5 companies achieves email marketing ROI of 7,000% or more, equal to $70 for every $1 spent. Returns vary significantly based on list quality, segmentation, and whether automation is in place.
What types of emails should I be sending?
The top-performing email programs, those hitting 45:1 ROI or better, most commonly send newsletters and onboarding emails, not promotional blasts. A balanced mix should include a welcome series, educational content, product updates, promotional campaigns, re-engagement emails, and post-purchase sequences. Each serves a different purpose in the customer lifecycle.
How does email personalization affect performance?
Marketers implementing AI-powered personalization report revenue increasing by 41% and click-through rates rising 13.44% compared to non-personalized campaigns. Personalization goes well beyond using a subscriber's first name. It includes dynamic content based on past purchases, location-based offers, and behavioral triggers tied to how someone has interacted with your site or previous emails.
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Frequency depends on your audience and content quality. Brands sending 9 to 16 emails monthly achieve the highest average ROI of any frequency bracket. Start conservatively (one to two times per week), monitor unsubscribe rates and engagement, and adjust from there. Consistency matters more than volume.
What is the average ROI for email marketing?
The average ROI for marketing emails in the US and UK is between 3,600% and 3,800%. Nearly 1 in 5 companies achieves email marketing ROI of 7,000% or more, equal to $70 for every $1 spent. Returns vary significantly based on list quality, segmentation, and whether automation is in place.
What types of emails should I be sending?
The top-performing email programs, those hitting 45:1 ROI or better, most commonly send newsletters and onboarding emails, not promotional blasts. A balanced mix should include a welcome series, educational content, product updates, promotional campaigns, re-engagement emails, and post-purchase sequences. Each serves a different purpose in the customer lifecycle.
How does email personalization affect performance?
Marketers implementing AI-powered personalization report revenue increasing by 41% and click-through rates rising 13.44% compared to non-personalized campaigns. Personalization goes well beyond using a subscriber's first name. It includes dynamic content based on past purchases, location-based offers, and behavioral triggers tied to how someone has interacted with your site or previous emails.
