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...

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...

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 main.cf example for reference, TLS, SASL support

Category: Knowledgebase

# See /usr/share/postfix/main.cf.dist for a commented, more complete version   # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian def...

Postfix inbound mail relay filtering example:

Category: Knowledgebase

These restrictions have been enabled on decisonconcepts.com's inbound remote mail relay server. # SMTPD Restrictions # # see:https://docs.rackspace.com/support/how-to/prevent-spam-in-postfix/ #https...

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 # --------...