[Dovecot] how to config dovecot for multiple domains, multiple SSL certs, and conditional IP access -- with passwd-file passdb?

[Timo Sirainen]

On Oct 6, 2009, at 10:05 PM, PGNet Dev wrote:

> i'd like to configure dovecot to,
>
>  host multiple domains, each on a separate IP
>  setup a separate SSL cert for each domain
>  respond with a different login_greeting for each domain
>  restrict access to, and access type (e.g., TLS req'd vs noTLS,
> secure auth OK) of, imap login based with conditional rules based on
> the guest's IP address.

Unfortunately Dovecot v1.x can't do any of this, except for "tls  
required/not required" part. Upcoming Dovecot v2.0 could do all of  
this though. For now you'd have to run a separate Dovecot instance  
with a separate config file for each such IP. Or, of course, Dovecot  
v2.0 alpha1 should be out pretty soon and testers are always  
appreciated. :)

In v2.0 you can do things like:

local_ip 1.2.3.4 {
   ssl_cert_file = </etc/ssl/certs/domain.org
   login_greeting = blahblah
}
remote_ip 192.168.0.0/16 {
   # ...
}