[Dovecot] Multiple domains to one inbox and temporary redirects...

[Thomas Harold]

On 8/31/2011 12:41 PM, Nick Rosier wrote:
> I'm using Postfixadmin to manage users and have server alias-domains.
> All mail sent to an alias-domain is delivered to the other domain. Quite
> easy if you've got postfixadmin already setup.
>
> Otherwise I think you could configure virtual_alias_maps in postfix to
> something like hash:virtual_domains
>
> virtual_domains:
> @example.net @example.com
>

It's been a while since I played with virtual_alias_maps, but does that 
allow Postfix to say "that account doesn't exist" during the initial 
SMTP transaction?  We try to reject as much as possible during the SMTP 
session to avoid any later bounces.  I remember that one of the ways of 
doing it was bad as Postfix would accept, then a later step (maybe the 
LDA) would say "whoops! can't deliver this".

So we do it one by one by creating a virtual mailbox under the primary 
domain (user1 at example.com) and then doing a virtual alias under the 
secondary domain (user1 at example.net -> user1 at example.com).