Hello.
I'm seeking some config advice.
I am not the Listserv admin at our site, but I do manage the Postfix
SMTP servers that Listserv forwards through.
I see thousands of these 450 errors in the logs everyday:
Jun 9 03:36:26 smtp-p2 postfix/smtpd[18435]: connect from
listserv.wheaton.edu[192.138.89.115]
Jun 9 03:36:26 smtp-p2 postfix/smtpd[18435]: NOQUEUE: reject: RCPT from
listserv.wheaton.edu[192.138.89.115]: 450 4.1.2
<[log in to unmask]>: Recipient address rejected: Domain not
found;
from=<owner-remark-users*redacted*-redacted**WHEAETON*[log in to unmask]>
to=<[log in to unmask]> proto=ESMTP helo=<listserv>
Jun 9 03:36:26 smtp-p2 postfix/smtpd[18435]: lost connection after RCPT
from listserv.wheaton.edu[192.138.89.115]
Jun 9 03:36:26 smtp-p2 postfix/smtpd[18435]: disconnect from
listserv.wheaton.edu[192.138.89.115]
I believe this is because Listserv tries to send via the SMTP server,
ignores the 450 response from the SMTP server, and tries over and over
again.
I can clear it up if I login to the Listserv box and delete all the mail
for which I've seen this symptom, but that's a pain.
What is the recommended/normal way to setup a Postfix relay so that
Listserv can figure out that it's trying to send to a bad domain and
thus remove the mail from the queue?
Thanks!
--
Jeff Beaird
Network/Systems Engineer
Academic & Institutional Technology
Wheaton College, IL
office: 630-752-5454
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