How to Test/Validate SMTP server

Discussion created by Jennifer_Jinhong_34 on Jan 22, 2013
Telnet to your smtp server like: telnet 25 Syntax : telnet {smtp_domain_name} {port_number} And copy and paste the below: helo mail from: rcpt to: data From: Subject: test mail from command line this is test number 1 sent from linux box . Note : Do not forgot the "." at end which represents end of the message