I have had an ongoing issue of ending up on the Spamcop blacklist several times over the last year. I'm working on trying to find out exactly <b>why</b> I keep getting listed on this blacklist.
You will see in the following link that we have been listed in the Spamcop List
The cause for the listing is listed as our system has sent mail to spam traps in the last week.
If you take a look at Senderbase, our volume of e-mail is relatively steady, with only a 14% increase over the last 30 days, certainly not out of the ordinary.
If you take a look at DNSStuff.com, Spamcop is the only spam list that we are on:
We are trying to figure out why. I do have a theory as to how it could possibly be happening, but I'm not certain. We use a spam screening program called "spam Lion" which works on a whitelist validation system. When a new user to sends mail into our domain, they will receive an auto reply stating that we use the spam Lion product and they must validate their e-mail address before spam Lion passes it to the end user. Could this message be considered enough to get it listed on the blacklist somehow? Let's say an e-mail was sent to address[at]myemail.com from (or appearing as from) one of the SpamCop Trap addresses. My spam Filtering software will bounce back a message with a link for a real user to click on and validate their e-mail address. If this somehow gets sent to the trap address, it will list me, correct? Is there any way to prevent any of this from happening? Is my theory impossible in SpamCop's eyes, or what? This is the only plausable explanation that I have been able to come up with, if anyone has any other ideas, please let me know.
The last 3 times we have been listed on SpamCop, I have monitored our firewall and there is no excess amounts of traffic coming from within the network, so I know none of our machines have been compromised.