Debian Testing/Wheezy, kernel 2.6.38, Postfix
I've had a procmail receipe in place for a few weeks now and it's been working well.
:0 * ^(TO|FROM):.+@mydomainname.* { :0c # Send a copy to the other email account. ! someone@anotherdomainname.com # File the original as normal :0 foldername }
Then a few days ago, probably after some OS updates, it fails with:
status=deferred (host mail.*******.*****.com[000.00.00.0] said: 451 4.4.0 DNS temporary failure (chkuser) (in reply to MAIL FROM command))
(I've removed the data identifying the destination)
I have also tried sending an email directly using /usr/bin/sendmail and that produces the same result, whatever the emails destination, so I'm assuming it must be my setup. I can't explain why it worked before but doesn't now though.
I have really no idea what this means as Postfix configuration is a series of magical incantaitions which I don't understand.
Some help would be much appreciated.