My host (Dreamhost) uses aliases to tie mailbox usernames to the actual email address, usually something like: mailbox m123456 = user@domain.com. When using the standard Squirrel Mail installation at Dreamhost, I can login with my email address alias (user@domain.com) and password instead of using my mailbox username (m123456).

With RoundCube I cannot. I must use the mailbox username (m123456) instead of the alias. I'm sure this is because I am logging into the IMAP server directly through the mail host:ports (like I would in Outlook, for example) verses using the host controlled Squirrel Mail utility.

There are two variables in the main.inc.php config file that I think I may help in this situation. The variables are: 'virtuser_file' and 'virtuser_query'. However, I'm not entirely sure of the usage of those variables and I cannot seem to find any documentation for them either.

Basically, are the two variables named above an option to get around this issue? If so, how would I go about implementing them in my RoundCube install?

Thank you,

DaveE