Mail User Connection Error

[zachsilvey]

I am running a small business network with Snow Leopard server. The main service that the server deals with is mail both imap and smtp. In the past any user that I add via Workgroup Manager and enable mail works fine. But recently I added a user named Tom and for some reason it won't connect it gives me a username or password error. I confirmed that it was just this account by adding another new account and it worked fine.