I have the spamcop email system forward my messages to an account on my MTA...
I'm getting the strangest error on about 8 of 10 messages:
Final-Recipient: rfc822;xxxx[at]xxxxx.org
Action: failed
Status: 5.0.0 (permanent failure)
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 550-'5.7.1 <xxxx[at]xxxxx.org>... Relaying denied'
Reporting-MTA: dns; c62.cesmail.net
c60.cesmail.net works fine, but c62 hasn't logged in for a while I guess?
Anyway, I have to quit using spamcop starting tonight because 8/10ths of my mail is getting rejected. Lame.
I checked everything I could. I don't believe the problem can be on my servers. I assumed it would go away on it's own, as sometimes spamcop has little problems. But when it didn't go away after a couple days I looked into it in detail. None of these bounce messages originate on my servers and, they only seem to occur with "c62" in the reporting-mta field.
My guess is that it's some sort of internal authentication (broken) mechanism.
