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/%TESTNUMBER --mail-rcpt recipient@example.com --mail-from sender@example.com -T - # Verify data after the test has been "shot" EHLO %TESTNUMBER HELO %TESTNUMBER MAIL FROM:%LTsender@example.com%GT RCPT TO:%LTrecipient@example.com%GT DATA QUIT From: different To: another body .