root@kali:~/pentesting-notes/checklists# nc -nv 127.0.0.1 2525 (UNKNOWN) [127.0.0.1] 2525 (?) open 220 myserver ESMTP Exim 4.84_2 Fri, 01 Mar 2019 18:59:34 -0500 EHLO myserver.byme 250-myserver Hello myserver.byme [127.0.0.1] 250-SIZE 52428800 250-8BITMIME 250-PIPELINING 250 HELP MAIL FROM: [email protected] 250 OK RCPT TO: [email protected] 250 Accepted DATA 354 Enter message, ending with "." on a line by itself From: "John Smith" [email protected] To: "Jane Doe" [email protected] Subject: test message sent from manual telnet session Date: Wed, 11 May 2011 16:19:57 -0400 Hello World, This is a test message sent from a manual telnet session. . 250 OK id=1gzs6r-0000kr-EM QUIT 221 myserver closing connection