Bug#494746: cyrus-imapd-2.2: connect(/var/run/cyrus/socket/lmtp) failed: Permission, denied

[Magnus Danielson]

Henrique de Moraes Holschuh wrote:
> On Sun, 20 Dec 2009, Magnus Danielson wrote:
>> I have found that running this command overcomes the problem without
>> messing with bits.
>>
>> adduser postfix mail
> 
> This reduces the overal security of your system.

The alternative to set the socket director to 755 seemed like less secure.

Regardless which is safest, the cyrus-imapd package needs to set it up 
correctly in order for cyrus and postfix to interoperate.

>> Essentially, for postfix to be able to see the socket:s it needs the
>> permissions. Letting the user postfix be part of the mail group is
>> less intrusive than letting everyone access the bits, so 750 for
>> permissions is correct rather than the workwaround 755.
> 
> You could have created a new group for this access control, changed the
> socket permissions using dpkg-statoverride to this new group, and added the
> postfix user to the new group.
> 
> That would be safer.
> 

That would work, but then the cyrus-imapd (or other suitable cyrus 
package) should do this, not me and all other users that want to use 
postfix and cyrus imap together.

Cheers,
Magnus