this come in a “failure notice” email from qmail,
but when checking with spamcop - the IP is not actually in their black list.
very strange, but i have it dozen of bounce-backs last week from the issue, and my client are complaining that their mails are not getting received, so there must be an issue somewhere.
anyone else getting these too? seems to be on win6 and win12.
so if i understand - if the sending smtp IP was changed so an IP address that USED to be be listed - then the recipient server may recognize it as listed now?
and just to clarify - it happenes to me about 3-4 times last week, using different emails, on different domains, on different accounts, on different servers… so it wasnt a once-off thing.
Spamcop listing can happen for many reasons, but mostly spam. This time a spammer signed for trial under a reseller and sent out huge number of spam mails. Before we did the cleanup many were sent.