Installing Postfix & Dovecot on a fresh Amazon EC2 Ubuntu Server 12.10 instance and setting it up so all mail to all subdomains goes to one local user with IMAP access.

postfix-dovecot-subdomains.md

Instance setup

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

Webmin setup

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

2. 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
   

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

4. sudo apt-key add jcameron-key.asc

5. sudo apt-get update

6. sudo apt-get install webmin

7. sudo passwd ubuntu so you can log into Webmin

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

Postfix setup

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

14. Un-used modules | Postfix Mail Server | click here

15. Command prompt again

16. sudo apt-get install postfix-pcre

17. cd /etc/postfix

18. sudo pico vdomains and add the line

    /((\w[\w\-]*)\.)+xenap\.to/ OK
    

19. sudo pico valias and add the line

    /@((\w[\w\-]*)\.)+xenap\.to/ [email protected]
    

20. sudo postmap valias

21. 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
    

22. sudo service postfix restart

404 on https://webmin-theme-stressfree.googlecode.com/files/theme-stressfree-2.10.tar.gz

404 on https://webmin-theme-stressfree.googlecode.com/files/theme-stressfree-2.10.tar.gz

This bit isn't needed any more, Webmin's default theme is OK