After doing the multi-server setup there are a few things I am having trouble with. First, do all the servers need their own reverse lookup or just the name servers? Second, how do I get it to route to roundcube / squirrelmail when I type example.com/roundcube? Should I have installed it on the web host server instead of the main server? I think I have more questions, but I think this is a good start. Edit: apparently I lied... in the dns records, should the a record for mail link to the mail server?