We are running a postfix mail server on dialup. All the mail for our group is
picked up my fetchmail in multidrop mode and fed to postfix. All of our
addresses are of the form fred at cybercolloids.net.
We have one user who works off site and they have a virtual pop box with the
name anne at cybercolloids.net. The problem is that the ISP, correctly, feeds
annes mail to the VPOP box and the rest to out multidrop box. However if the
mail is sent to fred and copied to anne it ends up in both boxes and our mail
server then sends anne another copy because it doesn't know she has already
got a copy from the vpop box. Is there some way I can stop our server
duplicating mail for anne.
Its not a huge problem, just annoying. I have thought to delete the vpop box
and route annes mail via some freebie email account.
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