I'm seeing more and more of qmail-smtpd exiting with status 256, which usually
indicates that the remote host is trying to send mail with bare linefeeds.
There have always been the occasional status 256 incidents, but it's seems that
a bare linefeed epidemic has started recently. I usually stick a line in my
tcprules file to cause messages from these hosts to be piped through addcr
before qmail-smtpd, but the list of such hosts is starting to get unmanageably
long, it's a pain in the ass to grep through the log files looking for these
things, and doing this defeats the whole purpose of rejecting the messages in
the first place. I'm sure Mirosoft is behind this somehow.
What is one to do? Are we fighting a losing battle against bare linefeeds?
Should I just give up and pipe everything through addcr, or patch the
functionality into qmail-smtpd? What would I be risking by doing so?
Chris
