Due to upstream ISP behavior that I can't control, I seem to be caught
between a rock and hard place in getting fetchmail to work right for me. I
use fetchmail in multidrop mode to support multiple users.
Initially, I had a problem that was causing multiple copies of email to be
generated. I tracked this down to email that had multiple recipients on
the "To:" line. Some upstream ISP would generate a message with a
different message ID for each "To:" recipient but leave the "To:" header as
is, and when fetchmail used the "To:" header as the envelope address it
would generate duplicates.
I attempted to fix this problem by using an "Envelope X-Original-To"
command for fetchmail. That did fix the problem above, but created a new
problem. I do get one message for each X-Original-To recipient, but
sometimes the message-ID is the same. In multidrop mode fetchmail
suppresses messages with duplicate message-ID, and I can't find a switch to
turn that behavior off. So now instead of the original problem of
duplicate messages, only the first recipient on the "To:" line gets the
message and the second recipient is dropped.
Any suggestions?
Thank you,
Howard