[Dovecot] Multiple network interface question

[Rick Romero]

On Wed, 2008-08-27 at 14:03 -0700, Daniel L. Miller wrote:
> Mike Henry wrote:
> > Hi all,
> >
> > Sorry if this question has been posted before. I have dug through the 
> > archives but haven't found any relevant answers to this question.
> >
> > I am running Dovecot on a server that serves a number of (virtual) 
> > domains each with a number of (virtual) users.
> >
> > To read mail I am providing a webmail client and have configured HTTPS 
> > connections using reverse DNS so that each domain has its own IP 
> > address and that each IP address gets mapped to a different virtual 
> > host. Each virtual host presents and HTTPS connection particular to 
> > their own domain using the SSL certificate for that domain so that 
> > each user only sees his or her own domain throughout.
> >
> > Is it possible to configure Dovecot so that mail-clients like 
> > Thunderbird or Outlook can connect via the default port using their 
> > own domain (maybe also using reverse DNS) and be presented with an SSL 
> > connection particular to that domain (i.e. using that domains 
> > certificate)?
> >
> > Any comments welcome.
> >
> > Thanks in advance,
> >
> >         -Mike
> At this time, Dovecot does not support multiple SSL certificates.  The 
> only way to implement it (currently) would be to install multiple 
> instances of Dovecot, listening on different IPs/ports.

You could use stunnel as well instead of multiple dovecots, the only
disadvantage being that you lose the source IP address.

Rick