SMTP
SMTP HELO
RFC821
#
# Server-side
REPLY EHLO 500 Command unrecognized
#
# Client-side
smtp
RFC821-only SMTP server (EHLO not supported)
From: different
To: another
body
smtp://%HOSTIP:%SMTPPORT/user --mail-rcpt 902@example.com --mail-from 902@example.com -T -
#
# Verify data after the test has been "shot"
EHLO user
HELO user
MAIL FROM:<902@example.com>
RCPT TO:<902@example.com>
DATA
QUIT
From: different
To: another
body
.