Mail from my list server (list.xcski.com, ip 74.202.84.134) to [your customer] is getting bounced with the message:
<[your customer]>: host domain-relay.mspring.net[198.185.2.85] said: 550 Dynamic IPs/open relays blocked. Contact <openrelay@abuse.earthlink.net>. (in reply to MAIL FROM command)
And when I try to email the address that it says to contact, I get a further bounce:
<openrelay@abuse.earthlink.net>: host madm-corleone.atl.sa.earthlink.net[207.69.200.218] said: 550 Unknown local part openrelay in <openrelay@abuse.earthlink.net> (in reply to RCPT TO command)
First of all, I’m not an open relay. Never have been, never will be. And unlike you, when I have an error message say “Contact:”, I make sure the email address actually exists. Can you bozos please fix your open relay check, and fix your bounce messages?