On Tue, Dec 26, 2000 at 11:36:00AM +0200, Kai Henningsen wrote: > Just tested that. ssh to master, telnet to localhost smtp, it was quite > willing to relay mail with a non-local envelope. (And left enough clues in > the header to track who did that just in case it ever becomes necessary.) > > Now if someone was to send much mail that way, I expect checking with the > admins in advance might be a good idea, but for low volume (and for > contents where the association with Debian in the mail headers won't be a > problem) this seems like an easy way to do it. > > For automated usage, I expect one would prefer something like netcat to > telnet, though :-)
Or better, ssh port forwarding. Simpler, more reliable, and encryption as a bonus. ssh -L localport:localhost:25 somewhere.debian.org sleep a_while and while ssh is connected, connect to localport on the client side to be forwarded to port 25 on localhost at the server side. -- - mdz