I have just received the following message from a listserv I subscribe to:

You have been automatically removed from the COMIXSCHOLARS-L list(Comix-Scholars) as a result of repeated delivery error reports from yourmail system. This decision was based on the list's automatic errormonitoring policy and has not been reviewed or otherwise confirmed by aperson. If you receive this message, then it means that something iswrong. While you are obviously able to receive mail, your mail system hasbeen regularly reporting that your account did not exist, or that youwere otherwise permanently unable to receive mail. Here is someinformation that may assist you or your local help desk in determiningthe cause of the problem: - The failing address is [my email]@HOTMAIL.COM. - The first error was reported on 2012-12-03. - Since then, a total of 41 delivery errors have been received. - The last reported error was: 5.0.0 550 SC-001 (SNT0-MC2-F36)Unfortunately, messages from 128.227.74.149 weren't sent. Please contactyour Internet service provider since part of their network is on ourblock list. You can also refer your provider tohttp://mail.live.com/mail/troubleshooting.aspx#errors. PLEASE DO NOT IGNORE THIS MESSAGE. While you can re-subscribe to thelist, it is important for you to report this problem to your mailadministrator so that it can be solved. This problem is not specific tothe COMIXSCHOLARS-L list and may also affect your private mail. Thismeans that you may have lost some private mail as well. Anyone trying towrite to you during the same time frame might have received the sameerrors for the same reason.    

What am I supposed to do to resolve this?