Your subject line, rewritten before you send.
Forward your draft — we'll flag the words that trip spam filters and rewrite them in your voice.
Free AI Email Content Analyzer
- What does the AI content analyzer do?
- It reads your email the way a spam filter and a subscriber both would — flagging trigger words, risky links, and formatting that hurts placement — then suggests rewrites that keep your voice.
- Will the rewrites sound like me?
- Yes — the AI rewrites in your tone, not generic marketing-speak. You always see the original and the suggestion side by side and choose what to keep.
- How do I get AI suggestions for my email?
- Forward your draft to your Mailtester address. We analyze the content and show specific, plain-English fixes with one-click AI rewrites for the content-based ones.
€9.99 for AI deep-dives.
You forward it.
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.
We actually open it.
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.
You get a report.
Plain English. Three things to change, in priority order. Unlock the bundle and we generate a subject, body, and CTA rewrite in your voice — paste them back into your campaign before lunch.
Two different tests.
Most people mix them up.
If you've ever searched "email tester," half the results check whether the address is valid. We do the other thing — whether the email itself will reach the inbox once you press send.
You upload a CSV of subscribers. The tool tells you which addresses bounce. Great for cleaning a stale list before a re-engagement send.
You forward one email — newsletter, launch, client note — to a one-time mailbox. We open it in real Gmail, Outlook, and Yahoo and tell you which tab it landed in, plus what to rewrite before you send it to your list.
We check whether your sends will land. That's the whole product.
Free to score. Pay only for the AI deep-dive.
Forward any email and get the score — free and unlimited. Buy credits when you want the occasional AI deep-dive, or go €9.99/mo if you send regularly. Cancel from the same screen you upgrade on.
Send your next one to the inbox.
Takes less time than picking a hero photo. No card, no signup, no anything.