On Wed, Dec 20, 2000 at 07:54:02AM -0500, Steven M. Bellovin wrote:
> 
> I've never had any trouble.  In fact, I received your message via a 
> forwarded POP3 connection, and will send the reply via a forwarded SMTP 
> connection....

I was thinking in the wrong direction conerning ssh and tunneling. 
Thanks to the ppl who pointed me to this.
Tcp over tcp doesn occur in this matter as one can also read 

http://www.openssh.com/txt/draft-ietf-secsh-connect-08.txt

were the matter of port forwarding is discussed.
Bye,

Mipam.