In my .procmailrc, I have the lines:
# Nuke duplicate messages
:0 Wh: msgid.lock
| $FORMAIL -D 32768 msgid.cache
and they seem to work quite well. However, I'd prefer to log that a
duplicate was seen, not just discard it out of hand. Has anyone got any
decent recipes for this kind of thing, or pointers on how to go about
writing such a recipe?
My mind not only wanders, it sometimes leaves completely.
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