[IMail Forum] Spammer found a way...

[Joe Wolf]

Here's the situation...  I'm using Imail 7.07 as a Backup Mail Spooler only (no mail account, domain list is in HOSTS file) to my primary mail server.  The relay settings are for Addresses only and the only address allowed for realy is my primary mail server (sounds good right?).    Here's what the spammers are doing.  They send a message to the BACKUP server with a known BAD primary mail address for a domain in the HOSTS file and a SPAM CC address that they want to send to.  The backup server accepts the mail because it is addressed to a domain in the HOSTS file and needs to send it on to the primary mail server.    Here's the problem:  It goes ahead and delivers the SPAM CC message right away.    The bad primary message will get bounced, but that doesn't matter... the spammer got his message delivered off my backup server.   How can I stop this?  Any ideas?   Thanks, Joe