On 20/08/2020 09:20, Gerry wrote:
On 8/20/20 2:56 PM, Admin Beckspaced wrote:
If postfix is handling your submission service you can have a look at postfwd
I use it to limit sending of emails, recipients, etc, etc Thanks for the suggestion!
I am using Postfix as the relay host behind dovecot-submissiond. Unfortunately, unless I'm missing something, submissiond does not seem to be able to add the SASL username to the message headers, so I don't have a good way to distinguish sending users on the relay server.
Add the SASL username to the message headers? The standard way of doing this is passing it through the AUTH parameter to the MAIL command. The Dovecot submission service supports this if Postfix announces the AUTH capability. I think the Postfix XCLIENT login field could achieve something similar, also provided that the XCLIENT capability with the LOGIN field is announced.
I haven't seen it being passed in a header so far.
Regards,
Stephan.