• clear out test mail

add to my own /etc/hosts:
74.104.50.63 newtux tux

ssh -x -p 28 -L2525:tux:25 tux

From my machine:

bjb@charmeleon ~ 507 $ nc localhost 2525
220 tux.oclug.on.ca ESMTP Postfix (Debian/GNU)
EHLO stuffed.animals
250-tux.oclug.on.ca
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250 8BITMIME
MAIL FROM:  bjb@stuffed.animals
250 Ok
RCPT TO:  bbutler@oclug.on.ca
250 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
ehlo stuffed.animals
mail from:  bjb@stuffed.animals
rcpt to:  bbutler@oclug.on.ca

.
250 Ok: queued as 6B42D1029C7
421 tux.oclug.on.ca Error: timeout exceeded
bjb@charmeleon ~ 508 $

• the email shows up in bbutler's mail /var/mail/bbutler
• email to bjb@newtux is rejected (newtux is not known as a local hostname) (this is good)