MailMum for Mail Server Admins

You run Postfix, Exim, or another mail server, and you’re tired of trusting a public RBL’s listing and delisting process, its false positives, and its opaque scoring. MailMum gives you the same RBL-style integration your mail server already knows how to use, but the list is entirely yours.

What you get

• Your own blacklist and whitelist, down to a single server if you want it — whitelist always wins over blacklist, and rules resolve hierarchically (server rule first, then account rule).
• Full visibility into every decision. Every DNS query MailMum answers is logged: which IP connected, to which server, when, and whether it was blocked or passed.
• Automatic network/ownership information for incoming IPs, looked up and cached, so you’re not running lookups by hand while investigating a suspicious sender.
• Analytics you can act on — blocked-vs-passed traffic, hourly request volume, and blacklist match counts per server.

Getting started

Add a server in MailMum, get a unique identifier, and point your mail server’s RBL check at MailMum — the same reject_rbl_client-style configuration you’d use for any public list. Full setup steps for Postfix, Exim, and others are in the MailMum documentation.

Then manage your IP rules yourself, with the full history of every decision MailMum made close at hand.

Read the MailMum Whitepaper for the reasoning behind the design, or check the FAQ for common questions.