We recently migrated mostly away from our cobalt raq4. We still use it for our list server, but our users have pretty much been migrated off the box to another server.
In shifting the role of the server, we had to change the name of the server from "corp.domain.com" to "cobalt.domain.com". Everything seems to work ok, however when you go into the site settings for the vsite, you see this in the alias field:
"4999 Email alias list in use, please try again soon".
when you go into the server control panel, and look at the list of mail aliases, you see:
The alias and test aliases were aliases created on the site panel to try to work around what we initially thought was a conflict between the machine name and the aliases (a duplicate alias). You cannot delete anything from the server alias settings. you can only ADD by trying to put something into the site alias field. It adds it to the email server alias list but still returns the errors.
The info in the UI comes from the PostgreSQL database. If it won't let you remove entries from there, that's kind of unusual... you could always go in and try to remove the data from the fields manually...