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Help! Mail Server Spoofing Prevention

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linux-howto

http://unix.stackexchange.com – Hoping I could have some help/assistance on this issue I'm having - I'm fair n00b to linux by the way so please be gentle if I am overlooking the obvious Was in the mail logs yesterday when i noticed the following messages.. only there were more like 10,000 odd hits... Jun 21 10:47:10 exi-svr-2 dovecot: pop3-login: Disconnected: user=, method=PLAIN, rip=67.228.94.206, lip=xxx.xxx.xxx.xxx Jun 21 10:47:10 exi-svr-2 dovecot: pop3-login: Disconnected: user=, method=PLAIN, rip=67.228.94.206, lip=xxx.xxx.xxx.xxx I added 67.228.94.206 to my firewall like so iptables -I RH-Firewall-1-INPUT -s 67.22 (HowTos)