Mail-Tester vs Unspam.email
Mail-Tester
mail-tester.com
Unspam.email
unspam.emailSide by side
| Figure | Mail-Tester | Unspam.email |
|---|---|---|
| Price from | $10/mo | $5/mo |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 10 | 7 |
| Spec score · Email Deliverability Software | 7.6 (#22) | 8.5 (#7) |
| Headquarters | Dover, Delaware, USA | The company lists 167 Madison Avenue, Suite 205, New York, New York 10016, United States, and a Barcelona office. |
| Privacy | The privacy notice says the service collects account and payment information and warns that information sent electronically may not be secure in transit. | The privacy policy says submitted test emails, including their headers and message content, are collected and stored to provide the service. |
| Purpose | Mail-Tester analyzes an email, its mail server, and sending IP, then reports what is configured properly and what is not. | Unspam is an email deliverability platform that checks spam signals, sender authentication, blacklists, previews, heatmaps, and inbox placement. |
| Support | The FAQ directs users to contact the maker for API help and translation files. | The company lists support chat and [email protected] for support or product inquiries. |
Plans
Mail-Tester
- 10 Tests$5, paid once
- 20 Tests$10, paid once
- 50 Tests / Month$10 a month
- 500 Tests / Month$25 a month
- 50 Tests$25, paid once
- 500 Tests$50, paid once
- 1 000 Tests Most Popular$80, paid once
- 2 000 Tests / Month Most Popular$80 a month
- 5 000 Tests$250, paid once
- 7 500 Tests / Month$250 a month
Unspam.email
- FreeFree
- No accountFree
- Custom plan$5 a month
- Basic$9 a month
- Business$19 a month
- Agency$29 a month
- White LabelPriced on request
In their own words
Mail-Tester
Mail-Tester checks an email, its mail server, and sending IP, then gives a spam score and reports configuration findings. To run a test, send a message to an address generated by the service and open the result page. Checks include blocklists, SpamAssassin, SPF, DKIM, Sender-ID, DMARC, links, and pictures. The free plan allows three tests within a rolling 24-hour period. A test counts after a new message is sent, the result page is requested, and the result is returned successfully; reopening that result does not use another test. Free results remain available for 7 days. With an account using its own prefix, results remain available for 30 days. Accounts also provide white-labeling, result-page CSS customization, statistics, a 30-day test listing, and pages without ads. Paid plans include an iframe and JSON API for integration; API output can include message details, authentication checks, body analysis, blacklist results, and broken links. One-time test bundles cost $5 as a one-time purchase to $250, paid once; monthly plans cost $10 a month to $250 a month. Passing does not guarantee inbox placement.
Unspam.email
Unspam.email is an email deliverability platform for examining spam signals, sender authentication, blacklists, previews, and inbox placement. Spam tests assess authentication, sender reputation, blacklists, and message content, then show which checks affected the score. Inbox placement tests send a campaign to seed mailboxes at Gmail, Outlook, Yahoo, and other providers and report where it landed. Email previews cover rendering across more than 50 real clients and devices in light and dark modes. Scheduled tests can track placement and spam scores and send alerts by email when results decline. Its API has 39 endpoints across seven areas and can test mail sent through SES, Postmark, SendGrid, Mailgun, or a sender’s own SMTP setup; an MCP server lets compatible AI clients run tests and retrieve results. The free plan includes 21 tests per month, unlimited sender accounts, and 14-day data retention, but excludes DMARC monitoring and full API access. Custom costs $5 a month, with a $5 monthly minimum and pay-per-test rates.