On Tue, Jan 04, 2011 at 01:24:51PM +0100, John Adams wrote:
>> 550-5.5.1<u...@example>: Recipient address rejected: User unknown
>> 550 5.5.1 For assistance, call 800-555-0101
>>
>> This feature is available in Postfix 2.8.
>
> Cool. Thanks.
> Can this be configured in a multi-domain environment e.g. via restriction
> classes in a way where every domain admin can supply his own contact
> details?
If you want multiple Postfix personalities, use multiple Postfix instances:
http://www.postfix.org/MULTI_INSTANCE_README.html
If you have light-weight instances via master.cf smtpd/inet services
bound to secondary IPs, you can configure each instance with a different
response via "-o" overrides.
Otherwise, the feature is correctly designed to append optional contact
information for the *system administrator* or a troubleshooting help URL
for senders having trouble delivering email via the *system* in question.
--
Viktor.
