This is a yahoo mailserver. The SpamCop blocklist does not list email addresses or domain names; it only lists the IPs of servers that are sending spam to our users and spamtraps. The reason that the mail server IP address is on our list doesn't have anythingto do with the specific email(s) you're sending. This is a shared IP/mailserver and spam is being sent thru this IP/mailserver by some user of the IP. Your ISP/hosting company is the administrator of the equipment on this IP.

*Only* the owner/admin of the server can determine the precise source fthe spam and make it stop as they are the only people who have access to the logs to determine the sender.

The blocklist is automated and IPs are listed when there are spam

reports and delisted when there have been no new reports for 24 hours. Please contact your ISP/hosting provider/outbound email service for additional information about this problem. Please show them a copy of the rejection.

It should be noted that there are companies providing additional anti spam services that are subscribed to by many ISPs. These companies routinely do the same thing for their clients. They maintain a very large database and screen mail for client companies. Again the same procedure applies, you have to contact your ISP to have them contact the company to find and resolve the problem.

It could be that the email's IP you are trying to send to has been hijacked. The spammers then use that IP address as a zombie to send spam from it. This could all be unbeknownst to the actual owner of that particular IP address. Let the owner know somehow if you can. Also, sometimes people get mad at someone and report their emails as spam. This could have happened too. Contact Yahoo customer support for a resolution. Be aware that they can't give out precise information about and email account for privacy reasons.