Grow your ecommerce store · Email marketing · 3 min read
Optimizing Email Marketing: A Practical Checklist
Short answer
Optimize email in order of impact: first make sure emails reach the inbox (authentication and list hygiene), then build the core automated flows, segment campaigns by behavior and engagement, improve content and offers, and test one variable at a time using clicks and revenue per recipient rather than open rates.
Most email programs don't need a revolution. They need a series of small fixes done in the right order. This checklist starts with the things that make the biggest difference.
1. Deliverability: get to the inbox
Nothing else matters if emails land in spam.
- Authenticate your sending domain with SPF, DKIM and DMARC. Google and Yahoo require this for bulk senders.
- Send from your own domain, not a free Gmail address.
- Offer one-click unsubscribe and honor it promptly.
- Keep spam complaints low. Google's guidance asks bulk senders to keep complaint rates below 0.3%, and lower is better.
- Remove hard bounces and sunset long-term inactive subscribers.
- Warm up new domains or IPs gradually if you're switching platforms.
2. List growth: quality over quantity
- Use a well-timed pop-up or flyout, not an instant interruption. See email pop-ups for Shopify.
- Offer a clear reason to join: discount, guide, early access.
- Add opt-ins at checkout where allowed.
- Never buy lists.
Track list growth rate and the source of each subscriber.
3. Automations: the always-on revenue
Make sure these exist and are working:
| Flow | Trigger |
|---|---|
| Welcome series | New subscriber |
| Abandoned checkout | Started checkout, didn't buy |
| Abandoned cart / browse | Identified visitor viewed or carted products |
| Post-purchase | Order placed or delivered |
| Win-back | No purchase in X days |
| Back in stock | Restock of a wanted item |
Review each flow's revenue per recipient twice a year. Our guide to email automation for ecommerce goes deeper.
4. Segmentation: send less to people who care less
Instead of sending every campaign to everyone:
- Engaged (clicked or bought recently): send most campaigns.
- Lapsing: send fewer, stronger campaigns.
- Inactive: re-engagement series, then suppress.
- Buyers vs non-buyers: different messages.
- Product interest: based on categories viewed or bought.
Segmentation usually raises revenue per email and protects deliverability.
5. Content and offers
- One clear goal per email.
- A subject line that tells people why to open.
- Mobile-friendly layout with readable fonts. See best font size for email marketing.
- A mix of education, stories, social proof and offers rather than discounts every time.
- Strong product photography and clear buttons.
6. Testing
Test one variable at a time:
- Subject lines
- Send times
- Offers (or no offer)
- Email length
- Layout: designed vs plain text
Judge by clicks and revenue per recipient. Open rates are inflated by privacy features in Apple Mail and others. Make sure samples are large enough; small lists produce noisy results.
7. Metrics to watch monthly
- Revenue per recipient (campaigns and flows separately)
- Click rate
- Conversion rate from click to order
- Unsubscribe rate and spam complaint rate
- List growth rate
- Email share of total revenue
8. Housekeeping
- Update footers, links and branding.
- Check flows still reference current products and policies.
- Remove expired discount codes from automated emails.
- Review consent records and privacy settings.
Document what you learn
Keep a simple log of tests and results: what you changed, the audience, the outcome and what you'll do next. Over a year, this log becomes a playbook for your list that new team members or agencies can pick up quickly, and it stops you repeating tests you've already run. Review it each quarter and turn consistent winners into defaults for future campaigns.
A 30-day optimization plan
| Week | Focus |
|---|---|
| 1 | Deliverability audit and authentication |
| 2 | Fix or build welcome and abandoned checkout flows |
| 3 | Create engagement segments; adjust campaign targeting |
| 4 | Start subject line and offer tests |
Small, steady improvements compound. For tool choices, see the top email marketing software for ecommerce.
Frequently asked questions
What's the most important email metric?
For stores, revenue per recipient is the most useful single measure, alongside click rate, unsubscribe rate and spam complaints.
How often should I email my list?
It depends on your audience and content. Many stores send one to three campaigns a week to engaged subscribers and less to inactive ones. Watch unsubscribes and complaints.
Should I remove inactive subscribers?
Yes, after a re-engagement attempt. Mailing people who never engage hurts deliverability and, on some platforms, raises your bill.
Sources and further reading
Platform features, prices and policies change. Check the official help pages linked above before you act on a detail that matters to your store.