Email Open Rate Guide
The average eCommerce email open rate is 18%. Our clients average 35%. Here is exactly what they do differently.
Open rates are declining across eCommerce. Gmail tabs. Inbox fatigue. iOS privacy changes muddying the data. Most brands respond by writing more clever subject lines. That helps, but it is maybe 20% of the equation.
The other 80% is infrastructure. Deliverability health determines whether your email reaches the inbox at all. Segmentation determines whether you are sending to people who want to hear from you. Send timing determines whether your email lands when the recipient is checking email. List hygiene determines whether dead contacts are dragging your metrics down.
This guide covers all of it. The same framework our Klaviyo Gold Partner team uses to push client open rates from 18% to 35%+. Follow every step and your open rates will improve. Skip the infrastructure steps and no subject line in the world will save you.
35%+
Target Open Rate
150+
Accounts Managed
Gold
Klaviyo Partner
80%
Infrastructure vs. Subject Lines
How to fix this — step by step
Audit your deliverability foundation
Check domain authentication — DKIM, SPF, and DMARC should all be configured and passing. Go to Klaviyo Analytics > Deliverability and check your inbox placement rate, bounce rate (under 0.5%), and spam complaint rate (under 0.1%). If any of these are failing, fix them before touching anything else. Bad deliverability means your emails are going to spam, and no subject line fixes that.
Clean your list with a sunset flow
Identify subscribers who have not opened or clicked in 180+ days. Send a 3-email re-engagement sequence. Suppress anyone who does not respond. This will shrink your list but dramatically improve engagement metrics. When 30% of your list is dead weight, they drag down your sender reputation and hurt deliverability for everyone else.
Segment by engagement level
Create segments: Highly Engaged (opened/clicked in 30 days), Engaged (30-90 days), At-Risk (90-180 days), and Unengaged (180+ days). Send campaigns primarily to Engaged and Highly Engaged segments. At-Risk gets re-engagement. Unengaged gets sunset. Sending to engaged contacts only will immediately lift your open rate because you are measuring opens from people who actually read email.
Optimise send timing
Check Klaviyo Smart Send Time or analyse your own data. When do your subscribers open emails? Most eCommerce brands see peak opens between 9-11am and 7-9pm in the subscriber's local time zone. Test different send times over 4-6 weeks and track open rates per time slot. The right send time can improve opens by 5-10% alone.
Write subject lines that earn the open
Keep subject lines under 40 characters for mobile. Use personalisation (first name, product category, location). Create curiosity without being misleading. Test emojis vs. no emojis. A/B test every campaign subject line. The winning formula varies by audience — test and track relentlessly.
Match from name to brand recognition
Your from name matters more than your subject line. If subscribers do not recognise who the email is from, they will not open it. Use your brand name, not a person's name (unless you are a personal brand). Keep it consistent across all sends so subscribers build recognition.
Monitor and iterate monthly
Track open rates by segment, by send time, by subject line style, and by campaign type. Build a testing calendar: one variable tested per campaign. Document what works for your specific audience. Open rates are a compounding metric — small improvements every month add up to significant gains over a quarter.
Want us to handle this?
This framework gives you a clear path from 18% to 35%+ open rates. Most brands who follow it find that deliverability and segmentation produce the biggest gains — not subject lines.
If you want a Gold Partner team to audit your deliverability, clean your list, build your segments, and optimise your send strategy — that is exactly what we do. Free Klaviyo audit. We review everything and tell you where the quick wins are.
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