Google IP is blacklisted by SpamCop
I've been having some problems with my email recently. I'm not receiving certain messages and certain messages I've sent or not being received by others. I've received no bounce messages for emails I've sent. Users who have sent email to me have not reported any bounce messages. I sent a test message to Unspam which reported that the sending IP address is currently blacklisted by SpamCop. The IP address is 74.125.224.51 which is a Google IP address.
I suspect this is the cause of the delivery problems although none of my friends who use Gmail seem to have noticed any problem.
Additional information:
I have a vanity email domain hosted at SquareSpace with email forwarding to my Gmail account. Because of a different issue some time ago, I set the From address of all emails to my Gmail address and the Reply-To to my vanity address. Unspam didn't report this as a problem.
This has been going on for more than a week and so far, that IP address has not been removed from SpamCop's blacklist. Since I don't own that email address, I can't ask to have it removed.
Any other suggestions to address this problem?