Exim vs OpenSMTPD
Exim
exim.orgOpenSMTPD
opensmtpd.orgSide by side
| Figure | Exim | OpenSMTPD |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Mail Server Software | 8.1 (#9) | 7.4 (#28) |
| Filtering | Users can use Sieve filters or Exim’s own filter language, which the manual describes as more powerful than Sieve. | Mail filters can evaluate SMTP sessions at phases including connection, HELO/EHLO, sender, recipient, data, and commit. |