Head to head
mailmcp vs Zerosmtp
Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.
No reviews yet
Your mailboxes in ChatGPT and Claude: Gmail, iCloud, Fastmail, any IMAP. Passwords stay yours.
Full listing
No reviews yet
A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.
Full listingThe short version
Neither has been reviewed yet, so the comparison rests on the scan and the public usage numbers. Both score close on the safety scan (95 and 92 out of 100). mailmcp is hosted and callable through the gateway; Zerosmtp runs on your own machine.
| mailmcp | Zerosmtp | |
|---|---|---|
| User rating | No reviews yet | No reviews yet |
| Safety grade | A95/100 | A92/100 |
| Adoption | Growing | Growing |
| GitHub stars | 0 | 5 |
| Downloads / week | – | 41 |
| Runs where | Hosted (remote) | Your machine (local) |
| Gateway-ready | Yes | No |
| Tools | — | 4 |
| Write actions | — | — |
| Price per call | Free | Free |
| Licence | NOASSERTION | MIT |
| Last release | 2026-09-19 | 2026-09-20 |
| Category |