outgoing mail over localhost port 25 ssh tunnel

[dan radom]

Is there any reason why I couldn't use ssh port forwarding to forward locahost 25 to a 
remote smtp server?  I'm constantly connectiong to different networks, and 
reconfiguring sendmail everytime to masq as another domain isn't a very good option.  
On another nonmutt related issue how would fetchmail react to that port 25 forwarding? 
 I suppose I could have fetchmail deliver mail directly to my MDA.  Has anyone set 
something like this up?

Thanks,

Dan