Rellena los espacios en blanco para completar el texto.
The following commands can be used to test if you companies mail server "mail.procrastination.com" SMTP, POP3, and IMAP servers are listening on their default ports and functioning.
SMTP - telnet mail.procrastination.com
POP - telnet mail.procrastination.com
IMAP - telnet mail.procrastination.com