MailTester.AI
Forward an email and get an AI deliverability report in 30s
MailTester.AI launched on October 4, 2025 with 327 votes, #70 of 8,178 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
MailTester.AI analyzes emails for deliverability and performance. Users forward an email and receive an AI-generated report within 30 seconds that identifies issues affecting engagement, open rates, and conversions. The tool works with newsletters, campaigns, and community emails, helping marketers and communicators understand how their messages will perform without manual testing or guesswork.
written from the facts on this page · September 2026
From the sources
Stop guessing how your emails perform. MailTester.ai instantly analyzes newsletters, campaigns, or community emails, giving actionable insights to boost engagement, open rates, conversions and saving you hours of guesswork.
Free mail tester for newsletters. Forward an email, get a score, a predicted Primary/Promotions/Spam split and a plain-English verdict in 30 seconds.
Forward your newsletter to the test address below. In about 30 seconds you get a deliverability score, where it lands — Primary, Promotions or Spam — and the three things to fix. Built for senders on Mailchimp, Substack and Beehiiv. Paste the mailbox above into the test-send field in Beehiiv, Kit, Substack, Mailchimp — or your own inbox. Hit go. We never see your subscriber list. In real Gmail, real Outlook, real Yahoo. We watch where your email lands — Primary, Promotions, or Spam — using the same filters that decide whether your campaign worked. Plain English. Three things to change, in priority order. Unlock the bundle and we generate a subject, body, and CTA rewrite in your voice —…from mailtester.ai
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