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Recommend a server-side email classifier (lemmy.world)

submitted 5 months ago* (last edited 5 months ago) by [email protected] to c/[email protected]

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I've been self-hosting email with Maddy for a bit, but haven't shared any of the addresses widely yet in part because I haven't set up a spam filter. I'm pleased with Maddy; there's much less to learn to get a server up and running with sane default behavior than with the email software of old.

Ideally, I'd like to go beyond just spam filtering and have something with arbitrary categories like newsletters and password resets. I would prefer that it learn categories when I move messages to IMAP folders from a mail client. Maddy can feed messages into arbitrary programs and pick a destination folder based on their output.

Web searches turn up a ton of classification programs, most of which seem to be more interested in playing accuracy golf with well-known corpora than expanding functionality beyond simple spam filtering.

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[–] [email protected] 2 points 5 months ago

That's a valid point, though it looks like Popfile's installation instructions call for manually installing libraries, presumably current ones. I think it processes only text, not PDFs or images, which are traditional sources of vulnerabilities. I'm fairly certain it doesn't attempt to execute Javascript. It is, itself written in Perl, which is memory-safe.

It's worth considering security because there's so much malware out there trying to spread indiscriminately, but Popfile is less vulnerable than an Android app (which bundles its dependencies) or anything written in C (which is subject to all kinds of memory management bugs).