Honestly, whoever has an idea for a spam detection measure for Mastodon, and by that I do mean an implementation, get in touch with me, I'll pay for it.
I've been thinking about solutions for the past few days but the more I think about them the more they appear pointless.
@Mainebot Massive and in-depth response.
IP reputation (Senderbase, Ironport, Spamhaus, RBLs), residential DUL bluck, SPF, Bayesian filters, large-scale realtime trend tracking, malware filtering, keyword matching (spamassassin), whitelists, milters, rate-limiting, trusted senders, realtime spam-reporting.
@Mainebot Also DKIM. I knew I was forgetting one.
Both DKIM and SPF address identity spoofingby way of increasing email header robustness.
@Mainebot Wikipedia's email anti-spam measures article is comprehensive, though many methods scale poorly or are fairly ineffective.
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