Sam,
is it possible that Courier behaves differently
depending on the return code of the filter?

I don't know what should be the preferred return
code when a virus is found in a message. I currently
use 554, can't remember why. The idea is to reserve
one of the 5xx codes to bear the additional internal
meaning that the bounce will contain no attachment.
(A more generic approach would be to use return codes
not used by SMTP, e.g. "850".)

Although normally it is much more practical for the
sender to get back the whole body, in case of viruses
it is often the worst thing to do. The envelope
sender address is probably just another address of
the victim's address book: including the body enhances
virus propagation. That's the rationale for determining
the content of the bounce at runtime.

I still have 0.39, but this summer hopefully will
upgrade to a newer version. I'm asking in case in
case such a feature is already in place... If not,
do you think you'd take a patch in that sense?

Ale


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