Shared Mailboxes and Postfix
Kevin P. Fleming
kpfleming at starnetworks.us
Mon May 9 11:25:54 EDT 2005
Josh Whitver wrote:
> As I understand it, this should allow us to send mail to "Conference+<shared
> mailbox name>@<domain>" and have the message delivered to the shared mailbox.
> This isn't what's happening, however. Initially, there was no mail-capable
> user named "Conference", so I created one, but now all mail sent to the address
> above gets delivered to the "Conference" user Inbox, not the shared mailbox.
I just went through this myself last week :-)
The Postfix 'local' process won't accept mail for users it can't
identify, so it does not think there is a valid local recipient for
'Conference' unless you add it as a user, which doesn't accomplish what
Instead, you need to make two changes in your Postfix main.cf:
First, add "recipient_delimiter = +", so that Postfix will ignore the
"suffix" after the username when looking for a match.
Second, if you don't already have a 'local_recipient_maps" line, add one
using the default contents (which are shown in the local(8) man page).
Third, create a file in your Postfix config directory called
'shared_folders', with contents like this:
(the second token can be anything, it just has to be present). In the
Postfix config directory, run "postmap hash:shared_folders" to create a
hash db from this file. Finally, add 'hash:shared_folders" to the end of
the local_recipient_maps line in main.cf and restart Postfix.
There is one downside to this configuration: Postfix will accept mail
addressed to Conference+<anything>, then Cyrus will reject it if there
is no matching folder. If you wish, you can list each valid shared
folder in the shared_folders file, and don't add the
'recipient_delimiter' option to main.cf, which will avoid this problem
but require more maintenance as you add/remove folders.
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