Trouble Getting to SpamCop?
geekwench writes "SpamCop was apparently the victim of a recent DoS attack. A false complaint to their domain registrar led to all primary DNS information being pulled. The problem is now fixed, but there may still be access issues for the next couple of days as ISPs clear the old DNS information out of their caches. You can read about it here and here. (Sounds to me as if SpamCop is proving to be a good-sized thorn in the sides of a number of spammers.)"
Because of caching, sometimes some things resolve and some don't... so, if www.spamcop.net doesn't work, try spamcop.net minus the www. Of course, if your mail server can't resolve their mail server properly, then submitted spam is a much bigger pain.
There is a new email worm called W32/Mimail-E that is designed to create a distributed denial of service attack on the anti-spam websites of spamcop, SPEWS, and spamhause. See: sophos write-up.
SPF support for most open source mail servers can be found at libspf2.
"A false complaint to their domain registrar led to all primary DNS information being pulled."
That's funny because a false complaint against us by spamcop led to all our servers being off the net for a day last year. They did ZERO research on the complaint and took it straight to our ISP (rather than trying to contact us by our abundant and up-to-date contact info available in our emails and on our websites). Their conduct was beyond reckless, it was vicious.
I'm all for good anti-spam but those guys can bite me. Serves them right IMHO.
closed minded is as closed minded does