Install Checklist
What software packages should NOT installed?Any other SMTP services such as : qmail , sendmail
Any other IMAP services
Optional : If you are using firewall make sure to open few ports below
* SMTP 25 TCP
* IMAP 143 TCP
* HTTP 80 TCP
What software packages should installed first ?
* Apache Webserver
* PHP
* MySQL
* OpenSSL
Optional Software packages ?
* Mailscanner
* Spamassassin
* ClamAV