Bowie Bailey writes: > I think the real question is: "Is there a benefit to doing this?" > > You are creating a rule with a negative score. Negative scoring rules > are for the purpose of preventing false positives. Are you having a > problem with signed emails being marked as spam? If not, this rule > will just increase your processing time by some amount and give you no > benefit.
Exactly -- that's the key. A few years back, we took a survey of what mails were false positives for SpamAssassin in our corpora. PGP-signed mails, mails from frequent correspondents, and mails from technical users -- these almost never showed up as FPs. However, once-off mails, initial contacts, and mails from legitimate, HTML-heavy, non-technical, mailing lists -- especially sales-oriented announcements -- they were the typical FP fodder. --j.
