c tcp_connect localhost:1025

c <~ 220
c -> EHLO localhost
c <... 250 HELP
c -> MAIL FROM: <>
c <~ 250
c -> RCPT TO: user@testserver
c <~ 250
c -> DATA
c <~ 354
c -> From: Mailer daemon <somewhere@horns.com>
c -> Subject: I've come to haunt you
c -> 
c -> Muahahahaha
c -> 
c -> 
c -> .
c <~ 250
c -> QUIT
c <~ 221