This post helps to install and configure a mail server with postfix as MTA[ (Mail Transfer agent), Dovecot as MDA (Mail Delivery Agent) and Squirrel mail as MUA (Mail User
Agent). This is a simple basic configuration without much advanced configurations. This is tested in Redhat linux and will also work in other redhat disrtos like
fedora, centos etc.
Assuming you have a configured yumserver. Else use the rpms.
#yum install postfix* dovecot* Squirrelmail*
Steps
1. Configure the DNS eg: example.com
2. Select the defalt MTA as postfix. Most systems it will be Sendmail.
#alternatives --config mta
Select postfix.
3. open the configuration file of Postfix and edit the following.
#vi /etc/postfix/main.cf
edit the following
1. my domain
2. my hostname
3. inet_interfaces
and reload the service.
4. Configure the Squirrel mail
#cd /usr/share/squirrelmail/config/
run the perl file
#./conf.pl
Give
1.Domain name
2.host name [FQDN]
3.protocol
5. Configure the dovecot
#vi /etc/dovecot.conf
protocols = imap
save it and restart the service.
#service dovecot restart
#chkconfig dovecot on
6. Add the MX entry to DNS. Dont fotget to give the priority.
7. Resolve the hostname in /etc/hosts.
8. Start the httpd [apache]
9. Thats it. you can now access the webmail through
http://example.com/webmail
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