telnet 200.107.224.16 25
Trying 200.107.224.16...
Connected to 200.107.224.16.
Escape character is '^]'.
220 mail.nexion.com.ar ESMTP Postfix
ehlo localhost
250-mail.nexion.com.ar
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN