OpenSMTPD
postfix
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| OpenSMTPD | postfix | |
|---|---|---|
| 18 | 2 | |
| 475 | 382 | |
| 0.8% | - | |
| 9.1 | 8.1 | |
| 18 days ago | 6 days ago | |
| C | C | |
| GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
OpenSMTPD
- OpenBSD acme-client で Let's Encrypt 証明書を取得する
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Xerox MFP, M365 SMTP
Any MTA will do, including OpenSMTPD, Postifix, Exim, Sendmail, qmail.
- Serveur SMTP sans restriction
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Simple e-mail server for local-only mailing?
OpenSMTPD
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Quest for the simple SMTP Server
opensmtpd Like: Reasonable sized, reasonably easy to configure Dislike: Easy to shoot yourself in the foot, DKIM setup is a p.i.t.a.
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Announcing vSMTP 1.1.3
Sounds like OpenSMTPd https://www.opensmtpd.org/ in that its a rewrite of older confusing SMTP servers.
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Best way to learn OpenBSD?
Any constructive suggestions about what beginners should refer to? Is there anything better than the FAQ? (And, any thoughts about a guide for smtpd? I know this is a rather different question, but I'd love to find something beyond just the manual pages at www.opensmtpd.org, )
- OpenSMTPD
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Hacker News top posts: Jun 11, 2022
OpenSMTPD\ (3 comments)
postfix
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New Linux glibc flaw lets attackers get root on major distros
FWIW C can do it too to some extent, here's postfix: https://github.com/vdukhovni/postfix/blob/master/postfix/src...
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At Least 30k U.S. Organizations Newly Hacked via Holes in MS’s Email Software
Postfix.
But that’s only an MTA i hear you cry, Exchange does both MTA & MDA! Bear with me.
Postfix is software to learn from. It might be written in C but the architecture is the epitome of beautiful modular design. It’s not just the meticulous separation of concerns, the care and attention to detail, everything from string handling to memory management is pristinely handled. https://github.com/vdukhovni/postfix
Even at runtime the beauty of the architecture allows for a sysadmin to choose (via master.cf) exactly how the components should be composed to fit their needs. The defaults are crafted for minimum fuss if you just need to get it running ASAP. The software is ergonomic in addition to being artfully crafted.
So what does all this care and attention get you? Only 9 CVEs in 22 years, only 3 of which are code exec, only 2 of which are (maybe) remote code exec, only 1 of which is unauth user RCE - but very hard in practice to exploit.
Maybe it’s just not that popular? It was 1/3 of all SMTP servers on the internet according to a 2019 scan.
So it’s the best MTA ever to exist, but what about MDA? Well, that was the whole point. Compose well crafted components together to build a system. You especially don’t run part of your mailserver’s web interface in kernel space because, well i’m not sure why IIS/Exchange does that :-)
What are some alternatives?
Exim - Exim Mail Transport Agent - source, testsuite and documentation
Haraka - A fast, highly extensible, and event driven SMTP server
CSS-Exchange - Exchange Server support tools and scripts
Qmail - Bind to different local ip addresses depending on the domain part of the sender argument when using `qmail-remote`.
Mailu - Insular email distribution - mail server as Docker images
Maildrop
Postal - 📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail
Dovecot - Dovecot mail server
Slimta - Python libraries to send, receive, and queue email.
MailCatcher - Catches mail and serves it through a dream.
MailHog - Web and API based SMTP testing