[Mailman-Users] virtual host in subscribe url

[Robin Rowe]

Configuring Mailman with Postfix and virtual domains. On old sever that 
someone else set up for me the subscribe path was:

  http://mydomain.com/mailman/subscribe/announce_mydomain.com

On new site I configured it is:

  http://mydomain.com/mailman/subscribe/announce

Is this merely a change across versions of Mailman or have I not 
configured something correctly?

Thank you,

Robin