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> On one of my servers (postfix 2.7) I need to do verp in such a way that
> I need to add recipient-id to envelope sender
> so if sender is email@example.com -->firstname.lastname@example.org
> 1111 is the numeric id of the recipient.
Postfix VERP works in a different way. It puts the complete recipient
name and domain into the sender address, instead of a short code that
identifies the recipient.
Is there a problem with sending VERP as implemented:
originalsender = sender@senderdomain
recipient = recipient@recipientdomain
verpsender = sender+recipient=recipientdomain@senderdomain
> Also I need to do VERP always , irrespective of whether the client sends
> an XVERP command or not.
You could use an SMTP proxy that always sends XVERP, as suggested
by Victor. There are lots of examples if SMTP proxies in PERL.