Junk Mail Rejection: rejection of entire top level domains - example

Category: Knowledgebase

Rejecting several ICANN-era generic top-level domains may be a good strategy in reducing junk mail delivery to your postfix server. Keep in mind: Unfortunately, all junk mail controls have the possibi...

Arch Linux Install Checklist

Category: Knowledgebase

Arch Linux Setup Checklist This is a checklist to aid in the installation of Arch Linux. This should accompany the official Arch Linux installation wiki below.   Guides: -http://itsfoss.com/install-a...

Postfix: access restrictions for each stage of SMTP conversation.

Category: Knowledgebase

Postfix allows you to specify lists of access restrictions for each stage of the SMTP conversation. Individual restrictions are described in the postconf(5) manual page.  Examples of simple restrictio...

Script For Preemptive banning of Malicious IP Address

Category: Knowledgebase

Please see article:  Enhancing Server Security With Preemptive IP Banning. for more information about this script.. please do not republish without proper credit to www.decisionconcepts.com # --------...

Postfix: Enable Listening for SSL on Port 587

Category: Knowledgebase

To enable port 587, edit the file /etc/postfix/master.cf   vi /etc/postfix/master.cf   and remove the # in front of the line:   #submission inet n - n - - smtpd   so that it looks like this:   submiss...

Create update-grub command in non UBUNTU systems

Category: Knowledgebase

Create "update-grub" command for Fedora and Fedora-derived systems: Red Hat Enterprise Linux CentOS   create the update-grub command   nano /usr/sbin/update-grub containing:   #!/bin/sh set -e ...