[gentoo-user] Maildir permissions, shared folders & postfix

[gentoo-user] Maildir permissions, shared folders & postfix

[Stroller]

Hi there,

It's my understanding that shared folders can be implemented in the  
Dovecot IMAP server by simply symlinking one maildir to another, eg:

	$ ls -lan /home/DOMAIN/ned/.maildir/
	total 40
	drwx------  9 10012 10000   440 Jan  9 04:23 .
	drwxr-xr-x  3 10012 10000   160 Jan  6 06:32 ..
	drwx------  5 10012 10000   264 Jan  9 04:21 .Deleted Items
	drwx------  5 10012 10000   232 Jan  6 06:32 .Drafts
	drwx------  5 10012 10000   232 Jan  6 06:39 .Junk E-mail
	drwx------  5 10012 10000   264 Jan  9 04:33 .Sent
	lrwxrwxrwx  1 10012     0    24 Jan  6 07:36 .Stroller -> /home/ 
stroller/.maildir/
	drwx------  2 10012 10000   336 Jan  9 04:23 cur
	-rw-------  1 10012 10000   268 Jan  9 04:23 dovecot-uidlist
	-rw-------  1 10012 10000   192 Jan  9 04:23 dovecot.index
	-rw-------  1 10012 10000 21504 Jan  9 04:23 dovecot.index.cache
	-rw-------  1 10012 10000  1908 Jan  9 04:23 dovecot.index.log
	drwx------  2 10012 10000    48 Jan  9 04:23 new
	-rw-------  1 10012 10000    47 Jan  6 07:45 subscriptions
	drwx------  2 10012 10000    48 Jan  9 04:23 tmp

In the above configuration the user Ned has a mailbox "Stroller", in  
which he can read messages & stuff - I can log in as ned and drag &  
drop messages into this mailbox quite happily.

I thought all was well with this type of shared configuration until I  
actually started to try setting it up for the info@ourdomain.com  
mailbox, and tried delivering messages to it.

It seems that Postfix doesn't respect the permissions of the parent  
folder when delivering mail into it:

	# ls -ldn /home/info/.maildir/
	drwxrwx---  5 10021 10000 120 Jan  9 04:26 /home/info/.maildir/
	# ls -ln /home/info/.maildir/
	total 0
	drwxrwx---  2 10021 10000 48 Jan  9 04:26 cur
	drwxrwx---  2 10021 10000 48 Jan  9 04:33 new
	drwxrwx---  2 10021 10000 48 Jan  9 04:31 tmp
	# ls -ln /home/info/.maildir/new
	total 0
	# cat HungUp.txt | sendmail info
	# sudo ls -l /home/info/.maildir/new
	total 4
	# sudo ls -ln /home/info/.maildir/new
	total 4
	-rw-------  1 10021 10000 1806 Jan  9 04:39  
1136781544.V4804I3606cM633316.mail.domain.local

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?

Stroller.


PS: should you consider suggesting using Dovecot's "namespaces" type  
of shared mailbox, I'd be grateful if you could answer this first:  
http://dovecot.org/pipermail/dovecot/2005-December/010459.html


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