[imp] vdomain setup - get the domain back to users login name

[Torsten Krah]

Hello.

I've got a setup where login names with @ are allowed in it. 
MTA and IMAP Server doing fine but i run into some problems with imp.

The login to horde works - the @ isnt stripped away.

But now it comes to imp log said:

[imp] FAILED LOGIN 127.0.0.1 to localhost:143[imap/notls] as mytestuser
[on line 237 of "/var/www/mail/htdocs/horde/imp/lib/Auth/imp.php"]')

But i've entered at login time the login "mytestuser at mytestdomain.test"
- this domain is gone but needed, how can i get it back.

Its a vdom setup - so i cannot add back the HTTP_HOST Domain to it - its
important what the users has entered - how can i do this?

kind regards

Torsten