On Fri, Jul 17, 2020 at 12:21:54AM +0200, Heiko Schlittermann via Exim-users wrote: > Evgeniy Berdnikov via Exim-users <exim-users@???> (Do 16 Jul 2020 18:14:21 CEST):
> > Unique mails MUST have unique Message-Id's. Some mail storage systems
> > (Cyrus, for example) remove duplicates by message-id automatically.
>
> And I'm looking for the cyrus option, that would disable exactly this.
AFAIK, this is a hardcoded behaviour of Cyrus, without any regulation.
But partially broken in some versions, :) say, cyrus 2.5.10 sometimes
don't remove duplicates, this is definitely a bug.
If you want to keep duplicates in IMAP box, I recommend Dovecot.
> Often I get responses to list messages as (B)CC. The (B)CC often arrives
> sooner than the response via the list. But only the response via the
> list would give me the right list headers for replying and such.
You may put procmail filter behind cyrus deliver to remove duplicates
that are Cc/Bcc copies to know list addresses, in order to wait for a
copy from list manager. It may be done with custom router for cyrus
delivery: run procmail and call cyrdeliver on the end of recipe.
--
Eugene Berdnikov
