Email marketing should generate 25-40% of your ecommerce revenue. If you are nowhere near that number, chances are you are making one or more of the mistakes below. We audit hundreds of ecommerce email accounts every year, and the same problems come up again and again.
Here are the most common email marketing mistakes ecommerce brands make and exactly how to fix them.
Mistake 1: Batch-and-Blast Everything
The single biggest mistake we see is brands sending the same email to their entire list, every time. No segmentation. No personalization. Just one generic campaign blasted to everyone from first-time visitors to loyal repeat customers.
Why it hurts: Subscribers who receive irrelevant emails disengage quickly. Your open rates drop, spam complaints rise, and email providers start filtering you into the promotions tab or worse, the spam folder. Mailbox providers like Gmail track engagement at the sender level. Low engagement from one segment drags down deliverability for everyone.
The fix: Segment your list at minimum by purchase history (non-buyers, one-time buyers, repeat customers), engagement level (active in last 30/60/90 days), and product interest. Even basic segmentation can increase email revenue by 760% according to Campaign Monitor.
Mistake 2: Not Having Automated Flows
If you are only sending manual campaigns and have zero automated flows, you are leaving 30-50% of your potential email revenue on the table.
The essential flows every ecommerce brand needs:
- Welcome series (3-5 emails for new subscribers)
- Abandoned cart (2-3 emails within 24 hours)
- Browse abandonment (triggered when someone views a product but does not add to cart)
- Post-purchase (order confirmation, shipping, cross-sell)
- Win-back (re-engage customers who have not purchased in 60-90 days)
These flows run 24/7 and typically generate 40-60% of total email revenue while requiring minimal ongoing maintenance. One fashion brand we audited was sending 12 campaigns per month but had zero flows. After implementing just the welcome series and abandoned cart flow, their email revenue increased by 38% in the first month.
Mistake 3: Over-Sending (or Under-Sending)
Both extremes hurt you. Over-sending leads to list fatigue, higher unsubscribe rates, and deliverability damage. Under-sending means your audience forgets about you, and when you do email them, they are more likely to mark it as spam.
The sweet spot for most ecommerce brands: - 2-4 campaigns per week for engaged segments - 1-2 campaigns per week for less active subscribers - Daily sends only during major sales events (Black Friday, launch weeks)
Monitor your unsubscribe rate. If it climbs above 0.3% per send, you are emailing too frequently or sending content that does not resonate.
Mistake 4: Ignoring Mobile Optimization
Over 60% of email opens happen on mobile devices. Yet many ecommerce brands design emails on desktop and never check how they render on a phone.
Common mobile issues: - Text too small to read without zooming - CTA buttons too small to tap (should be at least 44x44 pixels) - Images that do not scale properly - Layouts that break on narrow screens - Product grids with 3-4 columns that become unreadable
The fix: Design mobile-first. Use single-column layouts for key content. Keep subject lines under 40 characters so they display fully on mobile. Preview every email on both iOS and Android before sending.
Mistake 5: Weak Subject Lines
Your subject line determines whether someone opens your email or not. It is the single most impactful element of any email campaign. Yet most brands phone it in with generic lines like "New Arrivals" or "Check Out Our Sale."
Subject line best practices: - Keep them under 50 characters (40 for mobile) - Use specificity: "30% off our best-selling moisturizer" beats "Big Sale Inside" - Create curiosity without being clickbait - Personalize when possible (first name, last product purchased, location) - A/B test every campaign send with at least 2 subject line variants
Brands that consistently A/B test subject lines see 15-20% higher open rates over time.
Mistake 6: No Sunset Policy for Inactive Subscribers
Every email list has dead weight. Subscribers who have not opened or clicked an email in 6+ months are hurting your deliverability. Gmail, Yahoo, and other providers look at your engagement ratio. If a large percentage of your list never opens your emails, it signals to providers that your content is unwanted.
The fix: Implement a sunset flow. After 90 days of inactivity, send a re-engagement series (2-3 emails). If they still do not engage, suppress them from future campaigns. You can keep them on flows but remove them from regular sends. This alone can boost your open rates by 5-10 percentage points.
Mistake 7: Neglecting Email Deliverability
You can write the perfect email, but if it lands in spam, nobody sees it. Most brands never check their deliverability health.
Key deliverability actions: - Authenticate your domain with SPF, DKIM, and DMARC records - Maintain a clean list by removing bounces and invalid emails regularly - Warm up new sending domains gradually (start with your most engaged segment) - Monitor your sender reputation using tools like Google Postmaster Tools - Never buy email lists. Ever.
Mistake 8: No Clear Call to Action
Every email should have one primary action you want the reader to take. We see brands stuffing 5-6 different CTAs into a single email, which creates decision paralysis.
The rule of one: One primary goal per email. If it is a product launch, the CTA is "Shop Now." If it is a content email, the CTA is "Read More." Secondary CTAs are fine, but they should not compete visually with the primary action.
Mistake 9: Skipping Post-Purchase Emails
The post-purchase window is the highest-engagement period in the entire customer lifecycle. Open rates on order confirmation and shipping emails reach 60-70%. Yet most brands send bare-bones transactional emails with no branding, no cross-sells, and no relationship-building content.
What to include in post-purchase emails: - Branded order confirmation with product care tips - Shipping notification with estimated delivery and cross-sell products - Delivery follow-up asking for a review - Educational content about the product they bought - Cross-sell email 5-7 days after delivery
Mistake 10: Not Tracking the Right Metrics
Vanity metrics like total list size mean nothing if your list is full of unengaged subscribers. The metrics that actually matter:
- Revenue per recipient (total email revenue divided by emails delivered)
- Click-to-conversion rate (percentage of clickers who purchase)
- Revenue per flow (how much each automated flow generates monthly)
- List growth rate minus churn (new subscribers minus unsubscribes and bounces)
- Deliverability rate (should be above 95%)
Track these monthly and you will have a clear picture of what is working and what needs fixing.
Want us to build this for your brand? Get a free email audit at ecomcure.com
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