We're on mutilmailbox install including 2 mailbox server: mail1.abc.com and mail2.abc.com. Our virtual hosting address is: mail.abc.com. Each time, users login via mail.abc.com, they are redirected to their mailbox server and on address bar displaying their url mailbox server. Do you any ways to rewrite this url, make users transparent to mail.abc.com (They only see mail.abc.com)? Could you help me showing the right direction to go?