dominicsayers/postfix-dovecot-subdomains.md

## postfix-dovecot-subdomains.md

      
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              postfix-dovecot-subdomains.md
            
          
    Instance setup


Make sure the security group is allowing through any ports you need for SMTP & IMAP. Also open port 10000 for Webmin.
You'll want to give it an Elastic IP address so it doesn't wander aimlessly round the IPv4 address space.

Webmin setup


sudo apt-get install ntp ntpdate dkms htop - optional: these are just my favourite things


sudo pico /etc/apt/sources.list and add at the end:
## Manually added
# Webmin
deb http://download.webmin.com/download/repository sarge contrib
deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib


wget http://www.webmin.com/jcameron-key.asc


sudo apt-key add jcameron-key.asc


sudo apt-get update


sudo apt-get install webmin


sudo passwd ubuntu so you can log into Webmin


Go to https://ec2-12-34-56-78.compute-1.amazonaws.com:10000/ (use your own instance of course)


Postfix setup


We'll install Postfix through Webmin so Webmin moves it into the Servers menu properly.


Un-used modules | Postfix Mail Server | click here


Command prompt again


sudo apt-get install postfix-pcre


cd /etc/postfix


sudo pico vdomains and add the line
/((\w[\w\-]*)\.)+xenap\.to/ OK


sudo pico valias and add the line
/@((\w[\w\-]*)\.)+xenap\.to/ appmail@xenapto.com


sudo postmap valias


sudo pico /etc/postfix/main.cf and add the following at the end:
virtual_alias_domains = pcre:/etc/postfix/vdomains
virtual_alias_maps = pcre:/etc/postfix/valias


sudo service postfix restart