4bb3945355
This patch provides an emergency band-aid for the next wave of
MicroSoft email worms, fixes one bug, and makes external content
filtering a bit more robust.
- Feature: specify "body_checks = regexp:/etc/postfix/body_checks"
for an emergency content filter that looks at non-header lines
one line at a time (including MIME headers inside the message
body). This feature uses the same syntax as the header_checks
patterns. Details in conf/sample-filter.cf.
This feature is also available in Postfix snapshot 20000528.
- Bugfix: the masquerade_exceptions feature was case sensitive.
- Robustness: upon receipt of mail, Postfix maps MAILER-DAEMON@myorigin
sender address back into the magic null string, which prevents
mail from looping after processing by an external content filter.
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