How to Succeed in Email Marketing: 5 Core Strategies
Learn the 5 essential strategies to succeed in email marketing. From list building to segmentation, discover what separates high-performing campaigns from the rest.
Email marketing delivers a higher return on investment than virtually any other digital channel, yet most businesses leave most of that value on the table. The average ROI stands at 36 times what you spend, meaning businesses earn $36 for every dollar invested in email marketing. Getting to that number, or past it, requires more than sending newsletters on a schedule. It requires five core disciplines applied consistently.
This guide lays out those disciplines with specific, actionable detail. Whether you are building your first list or trying to improve a program that has plateaued, these strategies are where sustainable results come from.
Key Takeaways
Email marketing returns an average of $36 for every $1 spent, a 3,600% ROI.
Segmented campaigns generate up to 760% more revenue than non-segmented ones. Segmentation is not optional at scale.
Automated emails represent only 2% of email volume yet generated 37% of all email-attributed sales in 2024.
Fully authenticated senders (SPF, DKIM, DMARC) are 2.7 times more likely to reach the inbox than unauthenticated senders.
Brands that regularly A/B test their emails achieve 83% higher ROI than those that never test.
1. Build and Maintain a High-Quality List
Your list is the foundation of your entire email program. A large list of disengaged contacts does more harm than good. Inbox providers track engagement signals at the domain level, so a list full of non-openers hurts your deliverability for everyone on it.
Focus on permission-based, intent-driven list building. Use lead magnets that attract subscribers with a genuine interest in your product or content. Confirmation emails (double opt-in) reduce fake addresses and improve long-term engagement rates.
List hygiene matters just as much as list growth. Remove invalid addresses regularly to reduce bounce rates, cut costs, and reduce spam complaints. A monthly or quarterly review of inactive segments keeps your deliverability scores healthy.
How to Succeed in Email Marketing: 5 Core Strategies
Learn the 5 essential strategies to succeed in email marketing. From list building to segmentation, discover what separates high-performing campaigns from the rest.
Email marketing delivers a higher return on investment than virtually any other digital channel, yet most businesses leave most of that value on the table. The average ROI stands at 36 times what you spend, meaning businesses earn $36 for every dollar invested in email marketing. Getting to that number, or past it, requires more than sending newsletters on a schedule. It requires five core disciplines applied consistently.
This guide lays out those disciplines with specific, actionable detail. Whether you are building your first list or trying to improve a program that has plateaued, these strategies are where sustainable results come from.
Key Takeaways
Email marketing returns an average of $36 for every $1 spent, a 3,600% ROI.
Segmented campaigns generate up to 760% more revenue than non-segmented ones. Segmentation is not optional at scale.
Automated emails represent only 2% of email volume yet generated 37% of all email-attributed sales in 2024.
Fully authenticated senders (SPF, DKIM, DMARC) are 2.7 times more likely to reach the inbox than unauthenticated senders.
Brands that regularly A/B test their emails achieve 83% higher ROI than those that never test.
1. Build and Maintain a High-Quality List
Your list is the foundation of your entire email program. A large list of disengaged contacts does more harm than good. Inbox providers track engagement signals at the domain level, so a list full of non-openers hurts your deliverability for everyone on it.
Focus on permission-based, intent-driven list building. Use lead magnets that attract subscribers with a genuine interest in your product or content. Confirmation emails (double opt-in) reduce fake addresses and improve long-term engagement rates.
List hygiene matters just as much as list growth. Remove invalid addresses regularly to reduce bounce rates, cut costs, and reduce spam complaints. A monthly or quarterly review of inactive segments keeps your deliverability scores healthy.
Sending the same email to your entire list is the fastest way to underperform. Segmented campaigns produce a 14.31% higher open rate and 100.95% higher click-through rates compared to non-segmented ones.
The revenue impact of segmentation is not marginal. Personalized emails achieve 29% higher open rates and 41% higher click-through rates than generic messages, and segmented campaigns can generate up to 760% more revenue than non-segmented sends.
Segmentation does not require advanced technology to start. Begin with the basics:
New subscribers vs. repeat buyers: different offers, different tone.
Active vs. inactive contacts: re-engagement flows for cold segments, reward flows for loyal ones.
Purchase history: product recommendations based on what someone has already bought.
Browsing behavior: triggered emails based on pages visited or categories explored.
The leading segmentation and personalization tactics are email list segmentation (51%), individual email messaging (50%), and behavior-triggered emails (45%).
Personalization goes beyond using a subscriber's first name. 75% of shoppers are more likely to buy from a brand that remembers what they bought before and recommends products that fit. Behavioral data is your most powerful personalization input.
3. Prioritize Deliverability and Email Authentication
You can have the best subject line, the most compelling offer, and a perfectly segmented list. None of it matters if your emails land in spam. 1 in 6 marketing emails never reaches the inbox, getting filtered to spam or blocked outright.
Deliverability starts with technical authentication. The three protocols every sender must have configured are:
SPF (Sender Policy Framework): authorizes which servers can send email on behalf of your domain.
DKIM (DomainKeys Identified Mail): adds a cryptographic signature that proves the message has not been altered.
DMARC (Domain-based Message Authentication, Reporting and Conformance): ties SPF and DKIM together and tells receiving servers what to do when authentication fails.
Starting February 1, 2024, Google and Yahoo began requiring bulk senders (those sending more than 5,000 emails daily) to implement DMARC with at least a "none" policy. Following that rollout, Microsoft introduced its own email authentication rules for high-volume senders targeting Outlook.com domains, with enforcement beginning May 2025 for businesses sending more than 5,000 emails per day.
If you use a third-party email vendor, authentication is still your responsibility. Even if you outsource sending, authentication is tied to your domain.
Remove inactive or invalid addresses monthly or quarterly to lower bounce rates, cut costs, and reduce spam complaints.
Maintain a consistent sending cadence. Sudden volume spikes trigger filters.
Deliverability testing increases returns by 39% by ensuring emails avoid spam folders and reach their intended destinations.
4. Write Subject Lines and Content That Earn the Click
Getting into the inbox is necessary. Getting someone to open the email, read it, and act on it is the actual job.
Subject lines determine whether your email gets a chance. 69% of email recipients report emails as spam based on the subject line alone. That means a weak or misleading subject line does not just hurt open rates; it actively damages your sender reputation.
What works in subject lines:
Personalization: subject line personalization can increase open rates, with studies showing increases of up to 50%, one of the highest-impact optimizations available to marketers.
Length: subject lines between 36 and 50 characters perform best, balancing readability with mobile preview constraints.
Lead with the most important information. Do not bury the offer or the point.
Use a single, clear call to action. Multiple CTAs split attention and reduce clicks.
Write for mobile. 50% of people will delete an email if it is not optimized for mobile.
Test everything. Brands that regularly A/B test achieve 83% higher ROI than those that never test, with frequent testers achieving an average ROI of 4,200% compared to 2,300% for those who never test.
For a detailed guide on subject line best practices, see our post on email subject line best practices that boost open rates by 27%.
5. Use Automation to Send the Right Email at the Right Time
Automation is where email marketing separates from every other channel. Email automations deliver 30 times more revenue per recipient than one-off promotional campaigns, with the average return per recipient for campaigns at $0.11 while automated flows earn $1.94 per recipient.
Batch sends average a 14.5% open rate and 1.3% click-through rate. Automated sequences triggered by specific subscriber actions achieve a 42.1% open rate and 5.8% click-through rate. That is a 3x improvement in opens and a 4.5x improvement in clicks.
The core automated flows every program needs:
Welcome series: welcome emails boast an average open rate of 51%, while top-performing welcome emails earn click rates of 15% and placed order rates of nearly 10%. Sending multiple welcome messages rather than a single email can increase revenue by up to 51%. For a full breakdown, see our guide on welcome email sequence best practices.
Abandoned cart recovery: approximately 70% of online shopping carts are abandoned, and abandoned cart emails achieve a 50.5% open rate and recover 10 to 15% of lost purchases.
Post-purchase flows: post-purchase sequences achieve 61% open rates. Include order confirmations, onboarding guidance, and upsell or cross-sell recommendations timed to the customer's purchase cycle.
Re-engagement campaigns: identify subscribers who have not opened or clicked in 90 to 180 days. Send a targeted re-engagement sequence before removing them from your active list. This protects deliverability and gives dormant contacts a chance to return.
The trigger logic matters as much as the content. Behavior-based triggers (cart abandonment, product page visits, post-purchase actions) outperform time-based triggers because they respond to intent rather than a calendar.
Track the Metrics That Connect to Revenue
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.
The metrics worth tracking by priority:
Revenue per email (RPE): the single most direct measure of campaign performance.
Click-through rate (CTR): CTR is the most reliable engagement metric in the post-MPP era; unlike open rates, CTR cannot be inflated by privacy features and requires genuine user action.
Conversion rate: percentage of recipients who complete the desired action.
List churn rate: unsubscribes plus hard bounces. High churn signals relevance or frequency problems.
Spam complaint rate: keep this below 0.1% to maintain sender reputation with Gmail.
The top 8% of email programs, those hitting 45:1 ROI or better, most commonly send newsletters and onboarding emails, not promotions. That finding matters. The brands with the best email returns are investing in relationships, not just transactions.
How long does it take to see results from email marketing?
Most businesses see measurable engagement improvements within the first 30 to 60 days of applying segmentation, improved subject lines, and proper authentication. Revenue impact from automated flows typically becomes clear within 90 days, as flows like welcome series and abandoned cart sequences accumulate data and begin converting. List quality and deliverability improvements take slightly longer but compound over time.
What is a good email open rate?
Open rates have been significantly affected by Apple's Mail Privacy Protection (MPP), which registers automatic opens regardless of whether a person viewed the message. Open rates now reflect inbox delivery and technical detection more than true engagement, making them useful for spotting anomalies like deliverability issues but less reliable as a primary success metric. Focus on click-through rate and revenue per email as your primary performance indicators.
How often should I send marketing emails?
Brands sending 9 to 16 emails monthly achieve an average ROI of 4,600%, the highest of any frequency bracket. The right cadence depends on your audience and content quality. Monitor unsubscribe rates and engagement per send. If both stay strong, you have room to increase frequency. If either deteriorates, pull back.
Do I need to set up DMARC if I send low email volume?
Yes. Microsoft suggests all senders use SPF, DKIM, and DMARC to help reduce spam and spoofing, regardless of send volume. Mandatory enforcement currently targets bulk senders at 5,000 emails per day, but even low-volume senders benefit from authentication in terms of deliverability and domain protection. Setting up these records is a one-time technical task with a lasting positive impact on inbox placement.
2. Segment Your Audience and Personalize at Scale
Sending the same email to your entire list is the fastest way to underperform. Segmented campaigns produce a 14.31% higher open rate and 100.95% higher click-through rates compared to non-segmented ones.
The revenue impact of segmentation is not marginal. Personalized emails achieve 29% higher open rates and 41% higher click-through rates than generic messages, and segmented campaigns can generate up to 760% more revenue than non-segmented sends.
Segmentation does not require advanced technology to start. Begin with the basics:
New subscribers vs. repeat buyers: different offers, different tone.
Active vs. inactive contacts: re-engagement flows for cold segments, reward flows for loyal ones.
Purchase history: product recommendations based on what someone has already bought.
Browsing behavior: triggered emails based on pages visited or categories explored.
The leading segmentation and personalization tactics are email list segmentation (51%), individual email messaging (50%), and behavior-triggered emails (45%).
Personalization goes beyond using a subscriber's first name. 75% of shoppers are more likely to buy from a brand that remembers what they bought before and recommends products that fit. Behavioral data is your most powerful personalization input.
3. Prioritize Deliverability and Email Authentication
You can have the best subject line, the most compelling offer, and a perfectly segmented list. None of it matters if your emails land in spam. 1 in 6 marketing emails never reaches the inbox, getting filtered to spam or blocked outright.
Deliverability starts with technical authentication. The three protocols every sender must have configured are:
SPF (Sender Policy Framework): authorizes which servers can send email on behalf of your domain.
DKIM (DomainKeys Identified Mail): adds a cryptographic signature that proves the message has not been altered.
DMARC (Domain-based Message Authentication, Reporting and Conformance): ties SPF and DKIM together and tells receiving servers what to do when authentication fails.
Starting February 1, 2024, Google and Yahoo began requiring bulk senders (those sending more than 5,000 emails daily) to implement DMARC with at least a "none" policy. Following that rollout, Microsoft introduced its own email authentication rules for high-volume senders targeting Outlook.com domains, with enforcement beginning May 2025 for businesses sending more than 5,000 emails per day.
If you use a third-party email vendor, authentication is still your responsibility. Even if you outsource sending, authentication is tied to your domain.
Remove inactive or invalid addresses monthly or quarterly to lower bounce rates, cut costs, and reduce spam complaints.
Maintain a consistent sending cadence. Sudden volume spikes trigger filters.
Deliverability testing increases returns by 39% by ensuring emails avoid spam folders and reach their intended destinations.
4. Write Subject Lines and Content That Earn the Click
Getting into the inbox is necessary. Getting someone to open the email, read it, and act on it is the actual job.
Subject lines determine whether your email gets a chance. 69% of email recipients report emails as spam based on the subject line alone. That means a weak or misleading subject line does not just hurt open rates; it actively damages your sender reputation.
What works in subject lines:
Personalization: subject line personalization can increase open rates, with studies showing increases of up to 50%, one of the highest-impact optimizations available to marketers.
Length: subject lines between 36 and 50 characters perform best, balancing readability with mobile preview constraints.
Lead with the most important information. Do not bury the offer or the point.
Use a single, clear call to action. Multiple CTAs split attention and reduce clicks.
Write for mobile. 50% of people will delete an email if it is not optimized for mobile.
Test everything. Brands that regularly A/B test achieve 83% higher ROI than those that never test, with frequent testers achieving an average ROI of 4,200% compared to 2,300% for those who never test.
For a detailed guide on subject line best practices, see our post on email subject line best practices that boost open rates by 27%.
5. Use Automation to Send the Right Email at the Right Time
Automation is where email marketing separates from every other channel. Email automations deliver 30 times more revenue per recipient than one-off promotional campaigns, with the average return per recipient for campaigns at $0.11 while automated flows earn $1.94 per recipient.
Batch sends average a 14.5% open rate and 1.3% click-through rate. Automated sequences triggered by specific subscriber actions achieve a 42.1% open rate and 5.8% click-through rate. That is a 3x improvement in opens and a 4.5x improvement in clicks.
The core automated flows every program needs:
Welcome series: welcome emails boast an average open rate of 51%, while top-performing welcome emails earn click rates of 15% and placed order rates of nearly 10%. Sending multiple welcome messages rather than a single email can increase revenue by up to 51%. For a full breakdown, see our guide on welcome email sequence best practices.
Abandoned cart recovery: approximately 70% of online shopping carts are abandoned, and abandoned cart emails achieve a 50.5% open rate and recover 10 to 15% of lost purchases.
Post-purchase flows: post-purchase sequences achieve 61% open rates. Include order confirmations, onboarding guidance, and upsell or cross-sell recommendations timed to the customer's purchase cycle.
Re-engagement campaigns: identify subscribers who have not opened or clicked in 90 to 180 days. Send a targeted re-engagement sequence before removing them from your active list. This protects deliverability and gives dormant contacts a chance to return.
The trigger logic matters as much as the content. Behavior-based triggers (cart abandonment, product page visits, post-purchase actions) outperform time-based triggers because they respond to intent rather than a calendar.
Track the Metrics That Connect to Revenue
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.
The metrics worth tracking by priority:
Revenue per email (RPE): the single most direct measure of campaign performance.
Click-through rate (CTR): CTR is the most reliable engagement metric in the post-MPP era; unlike open rates, CTR cannot be inflated by privacy features and requires genuine user action.
Conversion rate: percentage of recipients who complete the desired action.
List churn rate: unsubscribes plus hard bounces. High churn signals relevance or frequency problems.
Spam complaint rate: keep this below 0.1% to maintain sender reputation with Gmail.
The top 8% of email programs, those hitting 45:1 ROI or better, most commonly send newsletters and onboarding emails, not promotions. That finding matters. The brands with the best email returns are investing in relationships, not just transactions.
How long does it take to see results from email marketing?
Most businesses see measurable engagement improvements within the first 30 to 60 days of applying segmentation, improved subject lines, and proper authentication. Revenue impact from automated flows typically becomes clear within 90 days, as flows like welcome series and abandoned cart sequences accumulate data and begin converting. List quality and deliverability improvements take slightly longer but compound over time.
What is a good email open rate?
Open rates have been significantly affected by Apple's Mail Privacy Protection (MPP), which registers automatic opens regardless of whether a person viewed the message. Open rates now reflect inbox delivery and technical detection more than true engagement, making them useful for spotting anomalies like deliverability issues but less reliable as a primary success metric. Focus on click-through rate and revenue per email as your primary performance indicators.
How often should I send marketing emails?
Brands sending 9 to 16 emails monthly achieve an average ROI of 4,600%, the highest of any frequency bracket. The right cadence depends on your audience and content quality. Monitor unsubscribe rates and engagement per send. If both stay strong, you have room to increase frequency. If either deteriorates, pull back.
Do I need to set up DMARC if I send low email volume?
Yes. Microsoft suggests all senders use SPF, DKIM, and DMARC to help reduce spam and spoofing, regardless of send volume. Mandatory enforcement currently targets bulk senders at 5,000 emails per day, but even low-volume senders benefit from authentication in terms of deliverability and domain protection. Setting up these records is a one-time technical task with a lasting positive impact on inbox placement.
