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" # 8 - CURLE_WEIRD_SERVER_REPLY 8 EHLO %TESTNUMBER VRFY recipient QUIT