How to mask @ symbol in username?

[Peter]

Hi,

I am trying to access an account with rsync that has a username like
this: 

"usernam at server.com" 

Please note: this IS ONLY the username, so to login vie ssh I have to
type usernam at server.com. I think it´s Ensim Webppliance, that handles
virtual accounts that way.

So now, if I waqnt to access this account with rsync, I must type
something like:

rsync -e ssh username at server.com@server.com:/home /backbup

that leads to an error, because obviously the second @ in the
username/server combo is not understood by rsync.

What can i do now? How can i mask the first @ ???


Thank you very much for your attention!

Peter