Honest comparison
Mail Tester Alternative: Real Inbox Placement With History and Monitoring, Not a One-Shot Score
Mail-tester.com is a genuinely useful free one-shot checker: send an email to a generated address and get a score out of 10 covering authentication, content flags, and a handful of blacklist checks. As a first sanity check it is hard to beat, and we recommend it for exactly that. But a score is not placement. Mail-tester never tells you whether Gmail put your message in the inbox, Promotions, or spam, because it does not test against real mailboxes at real providers. There is no per-provider breakdown, no history to compare against last month, and no monitoring between checks, so a blacklist hit on Tuesday goes unnoticed until you happen to test again. Inboxes is the tool for senders who outgrew the score: seed placement tests across Gmail, Outlook, Yahoo, iCloud, GMX, and Zoho, a fix list ranked by impact instead of a points deduction, full test history, and continuous monitoring of reputation, 130+ blacklists, and DMARC reports. Placement results are directional estimates, not guarantees, but they answer the question the score cannot: where did it actually land.
Side by side
Inboxes vs Mail-tester
| Capability | Inboxes | Mail-tester |
|---|---|---|
| Authentication and content checks | Included in every test | Yes |
| Placement at Gmail, Outlook, Yahoo, iCloud, GMX, Zoho | Yes | No |
| Test history and trends over time | Yes | No |
| Continuous blacklist + reputation monitoring | Yes | No |
| DMARC report parsing | Yes | No |
| Fix list ranked by impact | Yes | Score breakdown |
| Price | From $29/mo flat | Free, one shot at a time |
Comparison reflects publicly available information as of July 2026. Both products change; verify specifics before deciding.
// Where Mail-tester wins
When is Mail-tester the better choice? For a quick, one-off sanity check it is exactly right, and it costs nothing. If you send occasionally, just migrated an SPF record, or want a fast read on whether a template trips obvious content filters, run it through Mail-tester and move on. Inboxes earns a subscription when you send regularly enough that placement, history, and between-send monitoring compound; if that is not you yet, do not pay for it yet.
See it work
The placement board, live
Pick a sending scenario and watch a test fill in: placement per provider, authentication, blacklists, and the ranked fix list.
Inbox placement
96%
··%
· ·
Authentication
checking 130+ blacklists
Sample data. Seed results are estimates, not guarantees.