OpenSMTPD
5.9#23 in mail server softwareFree planFree planLinuxmacOSSelf-hosted
VisitOpenSMTPD vs Stalwart Mail Server
Stalwart Mail Server
7.1#4 in mail server softwareFrom $1.09 a yearFree planWebAPILinuxmacOS
VisitWhat both publish
| Fact | OpenSMTPD | Stalwart Mail Server |
|---|---|---|
| Security | Project goals include careful validity checks on network input and privilege separation to mitigate possible security bugs. | The product page lists mailbox encryption at rest with S/MIME or OpenPGP, DANE, MTA-STS, automatic ACME TLS, DKIM key rotation, access controls, rate limiting, and automatic IP banning. |
OpenSMTPD plans
- OpenSMTPDFree
Stalwart Mail Server plans
- Community EditionFree
- Enterprise — 50,000 to 99,999 mailboxes$1.09 a year
- Enterprise — 10,000 to 49,999 mailboxes$1.25 a year
- Enterprise — 5,000 to 10,000 mailboxes$1.48 a year
- Enterprise — 1,000 to 4,999 mailboxes$1.74 a year
- Enterprise — 500 to 999 mailboxes$2.04 a year
Pick OpenSMTPD if…
You want what its maker publishes above — check its page for the details.
Pick Stalwart Mail Server if…
You want what its maker publishes above — check its page for the details.