[CentOS] Sendmail failing on home machine
peterl at standingwave.org
Wed Nov 7 06:27:12 UTC 2007
I have a CentOS 5 machine at home, behind a NAT gateway. Among other
things, I'm running mdadm in monitor mode to alert me to RAID
failures. I want it to send messages to my main email address. Any
messages I send from the home CentOS box to that email address are
being rejected with this error:
Deferred: 451 Could not complete sender verify callout
My understanding is that the destination mail server is trying to
connect back to the source email host via SMTP as an anti-spam check
and is failing.
My external IP is set up with a dynamic DNS entry, so I guess I could
set up an MX record and actually receive mail on the home box, but I
don't want to deal with the security issues or the spam.
Any suggestions for allowing sendmail-dependent apps running on the
home machine to be able to send mail?
More information about the CentOS