Hi,

We have an email address that someone is using to Spam our listserv box. It is not someone here as I have checked the SMTP logs and it seems to happen at midnight almost every night. Whats happining is that the spammer is using an email address here as the from address and sending spam to listserv. Listserv is receiving the mail and try to process the "commands". Obviously it is unable to process and keeps serving out the address and we have to keep serving this address back on. Is there a way for listserv to block this IP address? Any help/suggestions will be greatly appreciated.

Thanks in advance.