SMTP VRFY # # Server-side REPLY VRFY 550 Unknown user # # Client-side smtp SMTP unknown user VRFY smtp://%HOSTIP:%SMTPPORT/%TESTNUMBER --mail-rcpt recipient # # Verify data after the test has been "shot" # 56 - CURLE_RECV_ERROR 56 EHLO %TESTNUMBER VRFY recipient QUIT