In which there’s a sendlog.

When mail is transferred from server to server across the net, this is what it looks like when the servers talk to each other. More or less.

LOG: MAIN
< = root@server.bmi.net U=root P=local S=381 [root@server ~]#delivering 1Raxum-0002J0-Cc Connecting to blahmail.goblinbox.com [66.240.255.128]:25 ... connected SMTP<< 220 fc8255128.aspadmin.net ESMTP SMTP>> EHLO server.bmi.net
SMTP< < 250-fc8255128.aspadmin.net 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN 250-STARTTLS 250-PIPELINING 250 8BITMIME SMTP>> STARTTLS
SMTP< < 220 ready for tls SMTP>> EHLO server.bmi.net
SMTP< < 250-fc8255128.aspadmin.net 250-AUTH=LOGIN CRAM-MD5 PLAIN 250-AUTH LOGIN CRAM-MD5 PLAIN 250-PIPELINING 250 8BITMIME SMTP>> MAIL FROM:
SMTP>> RCPT TO:
SMTP>> DATA
SMTP< < 250 ok SMTP<< 250 ok SMTP<< 354 go ahead SMTP>> writing message and terminating "."
SMTP< < 250 ok 1323903521 qp 8064 SMTP>> QUIT
LOG: MAIN
=> sender@goblinbox.com R=dnslookup T=remote_smtp H=blahmail.goblinbox.com [66.240.255.128] X=TLSv1:DHE-RSA-AES256-SHA:256
LOG: MAIN
Completed