On Jan 29, 2013, at 08:43, Markus Grunwald <mar...@the-grue.de> wrote:

> is it possible to use multiple certificates for my virtual mail domains?
> 
> I have configured my "main" mailbox as the-grue.de. For this
> domain, I can use  smtpd_tls_cert_file and smtpd_tls_key_file and tls
> works just fine :) But I don't see a possibility to add certificates
> for  the virtual mailbox domains like e.g. maennerchor-kirchseeon.de.
> 
> Is it possible to add certificates/tls for the virtual domains?

Your mail server has one (1) main identity; its own hostname.

I would advise you to get a certificate for that one hostname, for 
example 'mail.the-grue.de', and then have your customers use that in 
their MUA as the host to send and retrieve mail.

This is the simplest of setups, without any hassle long-term.

A possible alternative is to use a so-called 'multi-domain' 
certificate, which allows for a single certificate with several domains 
on it that you need to prove control over.

Individual certificates require multiple instances, if I am not 
mistaken. Check the mailinglist archives, I am quite sure this has been 
asked before.

Cya,
Jona

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