Email Marketing Audit: 10 Things to Fix This Week

Email marketing has an ROI problem - not because the channel is weak (it consistently delivers the highest ROI per dollar of any digital marketing channel), but because most implementations are significantly below what is achievable with modest improvements.

I have audited email programs at 15 companies over the past two years. The same problems appear with remarkable consistency. Here are the 10 I find most often, roughly ordered by how quickly you can fix them.

Fix 1: Your Welcome Email Has No Second Email

The welcome email - sent immediately when someone subscribes - typically has 5-10x higher open rates than subsequent emails. Most programs send one and move on.

Add a second email 2-3 days later that deepens the relationship. The welcome sequence should be at least 3-4 emails: a warm welcome, your best content or most useful resource, social proof or case studies, and a soft offer if you have one. Automated sequences in Mailchimp or ActiveCampaign can run this without any ongoing effort.

Time to implement: 2-3 hours. Typical lift: 15-25% increase in conversion from subscribers to active readers.

Fix 2: Sending Frequency Is Not Tested

Most companies chose their email frequency (weekly, biweekly, monthly) at some point and never revisited it. Frequency has enormous impact on engagement, unsubscribe rates, and revenue per subscriber.

The right frequency depends on your content quality, your audience's expectations, and your business model. The only way to know is to test. If you are sending weekly, try twice weekly for 90 days and measure open rate, click rate, and unsubscribe rate changes. The data is almost always informative.

Time to implement: Setup is 1 hour. Reading results takes 90 days.

Fix 3: Subject Lines Are Not Split-Tested

Subject lines drive open rates, which drive everything else. A 30% improvement in open rate from better subject lines is not unusual in a well-run A/B test program.

Every major email platform - Mailchimp, ActiveCampaign, Klaviyo, Kit - supports A/B testing subject lines. If you are not doing this, you are leaving the most accessible engagement improvement on the table.

Elements worth testing: question vs statement, personalization (first name) vs no personalization, length (short punchy vs descriptive), and emojis (they help in some audiences, hurt in others - you need to find out which yours is).

Time to implement: 30 minutes per test. Ongoing practice.

Fix 4: Your List Is Not Cleaned

Sending to inactive subscribers damages deliverability. Email service providers track engagement metrics, and consistently low engagement rates signal spam behavior, which reduces inbox placement for everyone on your list.

Define "inactive" for your program - typically 90-180 days without an open or click - and run a re-engagement campaign before removing inactive subscribers. If they do not engage with a re-engagement offer, remove them. A smaller, healthier list outperforms a larger, inactive one.

Time to implement: 2 hours to set up the segmentation and campaign. Ongoing quarterly practice.

Fix 5: Mobile Preview Is Not Reviewed

Over 60% of email opens happen on mobile devices for most consumer audiences. If your email is not readable on mobile, you are degrading more than half your engagement.

Check your emails in mobile preview mode before every send. Mailchimp and most platforms have a built-in preview mode. Also send a test to yourself and read it on your phone before hitting send.

Specific mobile issues to watch: font sizes under 14px are unreadable on small screens, call-to-action buttons need to be large enough to tap (44px minimum height), and single-column layouts work better than multi-column on narrow screens.

Time to implement: 5-10 minutes per send.

Fix 6: Click-to-Open Rate Is Not Tracked

Open rate tells you about subject line performance. Click rate tells you about content and offer performance. But click-to-open rate (CTOR) - clicks as a percentage of openers - tells you specifically about content performance independent of the subject line.

Track CTOR alongside open and click rate. A campaign with 30% open rate and 3% click rate has a 10% CTOR. Compare CTOR across campaigns to understand what content resonates after people open.

Time to implement: Adding the metric to your dashboard: 30 minutes.

Fix 7: Transactional Emails Are Not Optimized

Order confirmations, shipping notifications, and account emails get 2-5x higher open rates than marketing emails - and most companies treat them as pure operational emails with no marketing value.

Transactional emails are an opportunity to: recommend related products, invite referrals, request reviews, and reinforce brand voice. Add one low-friction marketing element to each transactional email. Do not over-commercialize them - they are trusted because they are useful, and you want to keep that trust - but leaving them purely functional is a missed opportunity.

Time to implement: 1-2 hours per email template.

Fix 8: Unsubscribe Data Is Ignored

When someone unsubscribes and cites a reason, that is direct user research. When you see a spike in unsubscribes after a specific email, that is a signal about content or frequency.

I find almost no companies systematically analyzing their unsubscribe data. The platforms collect it - check it monthly, look for patterns, and let it inform content and frequency decisions.

Time to implement: 1 hour per month.

Fix 9: No Behavior-Triggered Automation

Sending the same emails to everyone regardless of what they have done is a missed opportunity. Behavior-triggered emails - sent based on what a subscriber does or does not do - consistently outperform batch-and-blast sends.

Minimum viable automation program:

• Welcome sequence (if you do not have one - Fix 1)
• Browse abandonment email for e-commerce
• Re-engagement sequence for inactives (Fix 4)
• Post-purchase follow-up sequence

ActiveCampaign and Klaviyo are particularly strong for behavioral triggers. Mailchimp has basic automation that covers the essentials.

Time to implement: 4-8 hours for a basic automation setup.

Fix 10: No Documented Strategy Document

The companies with the worst email programs are the ones where no one has written down: who are we emailing, what are we trying to accomplish, what does success look like, what is the content calendar for the next 90 days, and who is responsible for each part.

This is a one-page document, not a 30-page strategy. Write it. Revisit it quarterly.

Time to implement: 2 hours.

For a comparison of email marketing platforms, see best email marketing tools and compare Mailchimp vs Klaviyo for specific feature breakdowns.