This document describes how to deploy AVG Antivirus for Linux/FreeBSD to the Qmail mail server. It is usable for AVG version 8.5, 10 and 2012.
Along with acting as a Web server, e-mail is one of the main uses of Red Hat Enterprise Linux 5-based system, especially in enterprise environments. Both the importance and popularity of email is surprising that some people to discover the complexity of the email is on a Linux system, and this complexity can often be a bit overwhelming for the newcomer RHEL.
Sendmail is the default SMTP (Simple mail transfer protocol) server installed on CentOS and although it can be slightly more complicated for beginners to learn than similar alternatives such as Postfix, it can be quite powerful and useful to learn. Sendmail by itself as the name suggests is a MTA (Mail transfer agent) which is useful for sending emails from your server to other servers.
When changing software configuration it is always a good idea to test things as thoroughly as you can. In the case of SMTP it is generally possible to test things offline pretty easily, and then perform simple tests via a manual telnet - but the SWAKS tool makes SMTP-testing even simpler.
To host more than one domain on your Postfix server, or you want to get away from using Linux system accounts for your mail user accounts. That is, you’d like to be able to give users email accounts without having to create actual Linux accounts on your mail server. Giving out as few accounts as possible makes your systems more secure.