MailTester vs Mail-Tester.com
MailTester and mail-tester.com are two different, unaffiliated products that happen to have similar names — this causes real confusion, so let's be direct about it. Mail-tester.com is a well-known, genuinely useful free tool for a single, one-off task: paste an email address, send it a test message, get a spam score. MailTester is a different kind of product: bulk and API email-list verification plus ongoing inbox-placement monitoring across your actual sending campaigns.
Where each tool genuinely wins
Choose MailTester for
- Bulk and real-time API email-list verification — mail-tester.com doesn't offer this at all
- Ongoing inbox-placement monitoring across Gmail, Outlook, and Yahoo — not a single one-off test
- Authentication diagnostics (SPF/DKIM/DMARC) tied to your actual sending domain over time, not one snapshot
- Built for teams sending real campaigns, not a single manual check
Mail-Tester.com is strong at
- A fast, free, well-known way to spot-check a single message's spam score before sending
- No account or setup required — paste an address, send a test email, get a score
- Widely trusted and linked to across the email-marketing community
Feature by feature
| Feature | MailTester | Mail-Tester.com |
|---|---|---|
| Real-time SMTP verification | Yes | Yes |
| Disposable & role detection | Yes | Yes |
| Anti-greylisting retries | Yes | No |
| Inbox placement testing included | Yes | No |
| Blacklist monitoring included | Yes | No |
| Team accounts with shared credits | Yes | No |
| Credit expiry | Never expire | N/A — no credit system |
| Free tier | 100 verifications | Unlimited single-message tests |
Price comparison
| Feature | MailTester | Mail-Tester.com |
|---|---|---|
| Bulk email-list verification | From $19 | Not offered |
| Real-time verification API | Included | Not offered |
| Ongoing inbox-placement monitoring | Included | Not offered |
Published list prices as of June 2026, rounded. Always confirm current pricing on the vendor's site.
The bottom line
These aren't really competing for the same job. If you just need to spot-check one message's spam score right now, mail-tester.com is a solid free tool for that. If you're verifying an email list before a send, or you want to track inbox placement across campaigns over time, that's what MailTester is built for — the two are complementary, not interchangeable.
Test us against Mail-Tester.com on your own list.
Run the same 100 addresses through both — your first 100 verifications here are free, so the experiment costs nothing.