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Tag Archives: postfix

Postfix ban failed logins script

By cheesefather | August 19, 2016 - 9:37 am |April 4, 2017 Linux
2 Comments

Fail2ban hasn’t been working for me, I still have people running brute force attacks on my Postfix server, so I though I’d rig up something myself. This consists of a bash script that identifies multiple failures and bans them, run on cron every 10 minutes. It checks for both smtp… Continue reading →

Tagged bash, brute-force, centos, fail2ban, ip, linux, postfix

Postfix automated backup/secondary email server with Virtualmin

By cheesefather | January 23, 2012 - 3:45 pm |May 13, 2013 Linux
5 Comments

There are various guides online for setting up Postfix as a backup (hold and forward) mail server which knows which accounts are valid on the primary (to prevent backscatter spam, so it only accepts emails for actual accounts that exist on the primary mail server). All of them are slightly… Continue reading →

Tagged account, automatic, backscatter, backup, forward, hold, mail, postfix, secondary, server, valid, virtualmin
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