Over the past few days I've had user complaints that they're trying to receive e-mails from customers using Yahoo e-mail accounts (go figure, someone in the real world using Yahoo) and the messages are getting blocked due to RBL. I'm not sure if it's Spamhaus or Spamcop doing it, I've actually e-mailed GWAVA tech support to see if it's possible to determine which RBL is bouncing the messages. Regardless, I'm curious if anyone else has noticed this. At least one of the customers is claiming he has had no problems e-mailing anyone else and that the problem must be with our antispam system. I don't think that's the case... I wouldn't be surprised if someone is using Yahoo's servers to send out spam causing them to be blacklisted. Though again it could be a Spamhaus or Spamcop problem with an erroneous RBL entry.

Anyone else notice anything like this lately with Yahoo?