SMTP RFC821 # # Server-side REPLY EHLO 500 Command unrecognized # # Client-side smtp RFC821-only SMTP with username and password mail body smtp://%HOSTIP:%SMTPPORT/%TESTNUMBER --mail-rcpt recipient@example.com --mail-from sender@example.com -u user:secret -T - # # Verify data after the test has been "shot" EHLO %TESTNUMBER HELO %TESTNUMBER MAIL FROM: RCPT TO: DATA QUIT mail body .