[Dovecot] Maildir permissions, shared folders & postfix

[Leeman Strout]

Stroller wrote:
> Hi there,
> 
> It seems that Postfix doesn't respect the permissions of the parent 
> folder when delivering mail into it:
> 
> How inconsiderate of Postfix to set secure permissions on the message it 
> delivered!! I need the message to have 660 permissions so that others in 
> the group can read it! At present this causes Squirrelmail to squeal & 
> give nasty messages whenever a shared mailbox is accesses.
> 
> Can anyone advise me how to resolve this, please?
> 

Well, my original reply got eaten since I hadn't subscribed. Ah well... 
let me try to recall it all:

Idea #1:  Switch to postfix virtual users.  This way all email is 
handled/owned by own uid/gid.  Works great unless you let people log 
into your machine.

Idea #2:  Use procmail and a recipe+script to chmod incoming mail as it 
arrives.

Idea #3:  Use a postfix alias piped to a script to do idea #2 without 
procmail.  Only issue I have is not knowing the rules for Maildir file 
naming, therefor I'd rely on procmail as I already use it.

Idea #4:  Use a postfix alias to 2 locations, the real one and the 
script.  Stick a delay in the script to wait for real delivery.  The 
script does the chmod.  Messy, since it relies on things happening 
elsewhere in a timely manner and this doesn't always happen.


Leeman