Major Description
Hi
When sending an email to a user with no lower case user name, a new Inbox is created for that user.
For example assume:
I have a user with "test1@t.t1" name for example. When I send mail to "Test1@t.t1", James accepts it but creates a new mail box with "Test1@t.t1" name in database(JAMES_MAILBOX table in USER_NAME field) and "test1@t.t1" user can't see the email.
It seems user existence check is case insensitive but mailbox creation is case sensitive.
James should not create a new inbox in this situation.
