
6 Oct
2006
6 Oct
'06
1:32 a.m.
Most spam filters work by 'scoring' an e-mail for the likelihood of spam. If it goes over a certain score, then it is marked as spam. It is most likely that encrypted e-mail would not score highly, unless part of the spam filter's scoring table specifically marks encrypted e-mail (which is probably not like). Since the encrypted e-mail won't contain strings that trigger off the spam filter, it is unlikely to be marked as spam.
Spamassassin (from memory) has a rule to massively consider encrypted mail as "not spam"