Problems with Blogger publishing via SFTP

if I understand correctly publishing with to my virtual server via SFTP is basically using the SSH service. Whilst I’m able to log on to for a secure file transfer form several programs without problem, fails.

The authentification log says:
Did not receive identification string from

My suspicion:
Blogger seems to send [[email address]]@[[]] instead of [[email address]] as UserID. As automatically adds @[[]] I can’t make changes to the settings. Can I set up SSH to accept the full userID? I also failed with [[email address]]@[[]] with other programs while [[email address]] works…