POSTSRSD(8)

💖 POSTSRSD(8) — the manual, but make it cute 💖

okay bestie, so this is the postsrsd page from the System Manager's Manual, and honestly? it's a whole vibe. sit down, grab a strawberry 🍓, and let's get into it.

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✨ NAME ✨

PostSRSd — the Sender Rewriting Scheme daemon for Postfix. yes, that's its government name. no cap.

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🌸 SYNOPSIS 🌸

postsrsd -s<file> -d<domain> [other options]

like, that's the whole shape of it. short, iconic, does exactly what it says. 👑

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🦋 DESCRIPTION 🦋

so basically, this is a Sender Rewriting Scheme implementation for Postfix. that's the whole thing. that's the girl.

now let's talk about what SRS actually is, because the lore is genuinely interesting ngl. the Sender Rewriting Scheme is a technique to forward mails from domains which deploy the Sender Policy Framework (SPF) to prohibit other Mail Transfer Agents (MTAs) from sending mails on their behalf. lowkey a whole boundary-setting moment.

with SRS, an MTA can circumvent SPF restrictions by replacing the envelope sender with a temporary email address from one of their own domains. so it's giving fake-ID-but-legal. 💅

this temporary address is bound to the original sender and only valid for a certain amount of time, which prevents abuse by spammers. periodt. expiration date = self care. ✨

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💅 OPTIONS 💅

one bullet per flag, because we do not skip. we do not summarise. we list all of them, fr fr.

• -h — show help. she's helpful! when you're lost, ask her. 🫶
• -C<file> — load configuration from <file>. the default is /usr/local/etc/postsrsd.conf. this is where the settings live, bestie, don't lose her. 🎀
• -c<dir> — use <dir> as the chroot directory. the default is /usr/local/var/lib/postsrsd. yes, chroot, as in the jail but make it cozy. 🔒
• -D — daemonize by forking into background. she's leaving the group chat to go be mysterious. 🌙✨
• -p<file> — write the PostSRSd process ID into <file>. your little bookmark of where she's at. 📌
• -u<user> — drop root privileges and run as <user>. the default is nobody. and yes, nobody is literally the default username, that's not me being dramatic, that's the actual system account. humble AND powerful, we love to see it. 👑
• -v — show version number. she'll tell you who she is. main character energy fr. ⭐

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heads up: that -u one is a real glow-up move — dropping root privileges is the whole point of running as nobody, so don't sleep on it. security is cute. 🌈

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🧚 a lil sign-off 🧚

this page is from postsrsd, dated May 2024, and it lives at POSTSRSD(8) in the System Manager's Manual. that's it, that's the page, you're fully caught up, go forth and forward your mail responsibly. byeee 💖🦋🌸