Is there any way to prevent a firewall running smapd (port 25) from
acting as a mail relay for mail that neither came from, nor is going to,
your domain? Our mailer is sendmail 8.8.8, and I've put into my
sendmail.cf the anti-relay measures suggested on several websites
(sendmail.org being one). If I kill smap & just run sendmail as a
daemon, they work great. However, if I run smapd as the primary
listener, the rules fail & the mail gets relayed. Thanks!
The Miami Herald