[CentOS] yum proxy username with @ character

Tue Sep 11 13:29:10 UTC 2007
David Toman <david.toman at dhl.com>

I am having problem with setting up the proxy for yum correctly. I have 
got no influence on proxy policy or authentication methods. The proxy 
username contains the '@' character.
My question is if there is any way how to enter the username correctly 
into the yum.conf. I tried many ways but has not been successful yet.

Many thanks,