SMTP Telnet Test:
bash-4.1$ mailx -vvv makwana.jignesh@gmail.com
Subject: Test mail
test
.
EOT
makwana.jignesh@gmail.com... Connecting to [127.0.0.1] via relay...
220 <smtp_server_name> ESMTP Sendmail 8.14.4/8.14.4; Thu, 30 Oct 2014 14:56:04 GMT
>>> EHLO <smtp_server_name>
250-<smtp_server_name> Hello localhost [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-AUTH GSSAPI
250-DELIVERBY
250 HELP
>>> MAIL From:<<smtp_user_name>@<smtp_server_name>> SIZE=235 AUTH=<smtp_user_name>@<smtp_server_name>
250 2.1.0 <<smtp_user_name>@<smtp_server_name>>... Sender ok
>>> RCPT To:<makwana.jignesh@gmail.com>
>>> DATA
250 2.1.5 <makwana.jignesh@gmail.com>... Recipient ok
354 Enter mail, end with "." on a line by itself
>>> .
250 2.0.0 s9UEu4Dk013833 Message accepted for delivery
makwana.jignesh@gmail.com... Sent (s9UEu4Dk013833 Message accepted for delivery)
Closing connection to [127.0.0.1]
>>> QUIT
221 2.0.0 <smtp_server_name> closing connection
bash-4.1$
