The discussion over the invalid space syntax got me thinking, so I
tracked my SMTP traffic for about 45 minutes. The only non-compliant
clients were clear spammers, save for two gray-area clients, one using
StrongMail <http://www.strongmail.com/> -- surprise, surprise a purveyor
of mass marketing software, and the other also a mass-marketing, if
legitimate, campaign. (Sorry, jacint...@....com, enravishin...@...com,
and ...@consumermodified.com, but thou doth giveth thyself away.)
Is this a useful option to add to _postcreen(8)_? I can't find anywhere
postscreen can classify anything as "meeeh" rather than accept/reject,
but from a few hundred samples (admittedly, quite small), this is a 100%
mass-marketing-positive classifier.
-Daniel
