[Dovecot] How do I use plus-addressing in Dovecot 1.1.x?
jon at jonfullmer.com
Sun Nov 2 22:33:45 EET 2008
I'm using Postfix, Amavisd-new/SpamAssassin, and Dovecot. They all run
on the same server (running Linux). The mailboxes are stored on the
same server in maildir format.
The logical path for incoming messages (as I understand it) is:
1) received by Postfix; handed off to Amavisd-new
2) Amavisd-new checks to see whether or not it's spam/undesirable;
hands off to Dovecot deliver
3) Dovecot deliver delivers the message to the local mailbox
Under each of my user's mailbox is a submailbox called "spam". Just so
I don't confuse terminologies (I'm no IMAP/maildir expert), for
example, we have someone at domain.com. My configured mail_location is
"maildir:/srv/mail/%d/%n", so this person's mailbox is located here: /
srv/mail/domain.com/someone/ Within this directory is another
The plan is to have Dovecot deliver send a message (which has been
labeled by Amavisd-new as spam) directly to the ".spam" submailbox,
instead of the INBOX (/srv/mail/domain.com/someone/). With Dovecot
1.0.x, I used "plus addressing". Amavisd-new was configured so that,
if a message was found to be spam, it delivered the message to Dovecot
deliver, but changed the delivery address. Now, instead of "someone at domain.com
", it was "someone+spam at domain.com". Dovecot deliver took this message
and delivered it correctly to the ".spam" submailbox (/srv/mail/
domain.com/someone/.spam/). Just to emphasize, this process does work
(using Dovecot 1.0.x).
With Dovecot 1.1.0, this process is broken. Now, spam messages are
delivered to the INBOX instead, and, when checking the dovecot-
deliver.log, I'm seeing "save failed to spam: Unknown namespace".
As best as I can tell, the answer seems to lie in "namespaces" as a
feature added in Dovecot 1.1.0. The problem is that I don't understand
how I could use them to resolve this situation. I've read the
documentation. I've looked at as many example configurations as I
Please help. I want to get this working again. I'm sure it's something
very straight-forward, but I don't understand. How must I change my
Dovecot 1.1.x configuration so that my "plus addressing" set up
(detailed above) will work again?
Or is there a better way?
Thanks so much for your help, and thanks for a great product!
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