I believe the info you want is on this web page:

http://www.postfix.org/VIRTUAL_README.html

I think you want what's described in the section called:
"Postfix virtual ALIAS example: separate domains, UNIX system accounts"

whereas now you're using the method listed under:
"As simple as can be: shared domains, UNIX system accounts"

--
Greg



Des wrote:
> On Wed, 25 Jan 2006 21:50:34 GMT, Greg Hackney <hackney@swbell.net>
> wrote:
>
>
>>One thing to check for, is to make sure that "mydestination" in main.cf
>>doesn't include any virtual domain names. Excerpt from "man 5 postconf":
>>
>> mydestination
>> Do not specify the names of virtual domains - those domains are
>> specified elsewhere. See VIRTUAL_README for more information.
>
>
> Currently, I have,
> mydestination =
> $myhostname,localhost.$mydomain,mysql:/etc/postfix/mysql-mydestination.cf
>
> That last part is the mechanism by which postfix recognises the
> virtual domains configured for this box - the names are stored in a
> MYSQL db. Without this, postfix will never terminate the mail on this
> box.
>
> There is a conflict with the need to recognise *some* local names,
> such as 'root' and 'postmaster', but not let fetchmail allow spam to
> 'attack' the long list of aliases associated with the services.
>
> Just wondering how other fetchmail/Web-cyradm users avoided this
> problem.