mysociety/alaveteli — pull request #1284 by mhl (2013-12-10 12:37:19+00:00)
Title: Rewrite myhostname in /etc/postfix/main.cf in the install script

This is necessary because the install script is also run on creating a
new EC2 instance from the AMI in order to update the configuration with
the new internal and external names; the hostname will be different in
this case and otherwise myhostname wouldn't be rewritten.