[Dovecot] Different SSL requirements for connections on different ports?

[Ron Leach]

On 29/05/2012 16:55, Timo Sirainen wrote:
> On Tue, 2012-05-29 at 15:09 +0100, William Gallafent wrote:

>> I would now like to add a webmail front-end (squirrelmail) running on
>> the same server. In order to achieve this I would like to have
>> squirrelmail connecting locally using IMAP, but without the
>> certificate requirement.

>> Do I need to run two separate dovecot instances in order to achieve
>> this, or can I somehow configure different SSL requirements for the
>> two ports?

> for now you'd need to run two Dovecot instances.
>

[Keen to do the same thing.]  I guess those two Dovecot instances 
could run either on (a) the same machine, or (b) different machines - 
though using a network-visible mail storage location.

Does this dual-Dovecot solution become problematic if the mail storage 
location is NFS?  I'm aware of the cautions regarding NFS access from 
two different machines (case (b), here).  If these two Dovecot 
instances were on the same machine (case (a)) but which nevertheless 
used an NFS mail storage location, would we then also hit the NFS 
dual-access problem from this single machine running the two instances?

Ron