Amaru Netapshaak wrote:
Thanks for your response. The emails in the queue are bounces
from my email server. This box is just an email gateway which relays
to an internal email server.
I believe NDR means "Non Deliverable Return" -- im basing my decisions
on that assumption. :) So yes, these are NDRs.
All the MAILER-DAEMON messages are for recipients on my internal
email server, but those recipients no longer exist. There are thousands
of accounts on the internal email server, so specifying them in a
recipient list seems excessive. Perhaps im not reading those documents
carefully enough. I am already specifying $relay_domains. But since
I am relaying, using "local_recipient_maps" wont help, and a "relay_
recipient_map" would be a major hassle. Any other tips?
You need to validate recipients. The best way to do that is
to create a relay_recipient_maps table. Automate the
procedure so you don't have to mess with updates.
The trouble of implementing proper recipient validation will
pay off handsomely when compared with dealing with an
overloaded server. And you will be blacklisted as a
backscatter source, which will be a major headache.
If it's simply not possible to get a user list from the
internal server, let postfix build one automatically by using
recipient verification. This only works if the internal
server rejects unknown recipients during SMTP, and doesn't
itself accept and bounce.
http://www.postfix.org/ADDRESS_VERIFICATION_README.html#recipient
--
Noel Jones
