Category
Campaigns, newsletters, A/B testing, segmentation, engagement, and improving click-through and conversion rates.
61 posts
Ensure your email templates render correctly with real data. Use automated testing to catch merge field bugs before sending.
Detect declining open and click rates early with real-time email verification. Prevent deliverability issues and maintain strong sender reputation with.
Drive higher engagement by aligning email timing with recipient timezones and natural human rhythms.
Learn how retina images and srcset work in email clients. Discover why most email clients don’t support srcset, and how to verify your email images still.
Discover how Gmail’s image prefetching distorts your A/B test open rate results. Learn the technical truth and how to verify your list for accuracy.
Learn why updated images in Gmail emails don’t refresh due to proxy caching, and how to fix it. Prevent broken visuals in your campaigns.
Stop relying on false opens. Learn how Gmail’s image prefetching skews engagement metrics — and use MailTester’s inbox-placement tests to measure real use.
Prevent email preview text from being cut off. Learn how to test preheader length across inboxes and fix truncation before your next campaign launch.
Maximize open rates with email subject line testing backed by real inbox data. Clean your list, validate addresses, and measure deliverability impact.
Test how your preheader text appears across email clients. Ensure visibility, avoid truncation, and improve open rates with real inbox placement testing.
Improve inbox placement and engagement by testing emoticons and special symbols in email subject lines across devices.
Make custom web fonts work reliably in email clients. Learn the exact steps to test and verify font rendering across inboxes with real-world inbox.
