SSMTP.CONF(5)

🎀 SSMTP.CONF(5) 🎀

okay bestie, welcome to the File Formats Manual page for ssmtp.conf 💖 this is a short one, we love a short one, let's get into it.

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✨ NAME ✨

ssmtp.conf — the configuration file for ssmtp. that's it. that's the name. iconic behavior honestly 🌸

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📖 DESCRIPTION 📖

okay so, first thing: ssmtp reads all of its configuration data from /etc/ssmtp/ssmtp.conf 💅

The file is just keyword-argument pairs, one per line. That's the whole format. One per line, no notes.

Lines that start with # are comments, and empty lines count as comments too. So go off — annotate that file like it's your diary, nobody's stopping you 🎀

Now, the possible keywords and what they do (heads up bestie: both the keywords and the values are case-insensitive — Mailhub, mailhub and MAILHUB are all the same girl, no drama):

• Root — the user who gets all the mail for userids less than 1000. If you leave it blank, address rewriting is disabled. gone. off. 😭
• Mailhub — the host to send mail to, in the form host port | IP_addr port [: port]. The default port is 25. ✨
• RewriteDomain — the domain from which mail seems to come. for user authentication.
• Hostname — the full qualified name of the host. If you don't specify it, the host gets queried for its hostname instead. the machine will simply tell you, periodt.
• FromLineOverride — specifies whether the From header of an email, if any, may override the default domain. The default is "no". 🙈
• UseTLS — specifies whether ssmtp uses TLS to talk to the SMTP server. The default is "no".
• UseSTARTTLS — specifies whether ssmtp does an EHLO/STARTTLS before starting SSL negotiation. See RFC 2487 📜
• TLSCert — the file name of an RSA certificate to use for TLS, if required.
• TLSKey — the file name of an RSA key to use for TLS, if required. 🔑
• TLS_CA_File — a file of trusted certificates for validating the server, if required.
• TLS_CA_Dir — a directory of trusted certificates for validating the server, if required.
• VerifyPeer — specifies whether ssmtp verifies the peer (server) certificate. 🕵️
• VerifyPeerName — specifies whether ssmtp verifies the peer (server) hostname.
• AllowSelfSigned — specifies whether ssmtp allows self-signed certificates.
• AuthUser — the user name to use for SMTP AUTH. The default is blank, in which case SMTP AUTH is not used. sent without
• AuthPass — the password to use for SMTP AUTH. 🤫
• AuthMethod — the authorization method to use. If it's unset, plain text is used. May also be set to "cram-md5". slay.

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🗂️ FILES 🗂️

• /etc/ssmtp/ssmtp.conf — contains configuration data for ssmtp. yes, the file we've been talking about this whole time. the one. the only. 👑

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👀 SEE ALSO 👀

ssmtp(8) — go read that one next bestie, it's the whole other half of the story 🦋

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💜 AUTHORS 💜

This page was brought to you by:

• Matt Ryan (mryan@debian.org)
• Hugo Haas (hugo@debian.org)
• Christoph Lameter (clameter@debian.org)
• Dave Collier-Brown (davecb@hobbes.ss.org)
• Syed Shahrukh Hussain (syed.shahrukh@ossrevival.org)

And the man page itself was written by Reuben Thomas (rrt@sc3d.org). give them their flowers 💐

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<div align="center">— 🎀 —</div>

ngl that's the whole page, you ate it. this was the Debian edition of SSMTP.CONF(5) dated Feb 19, 2026 — go configure something cute, k bye 💅✨🫶