How to modify the host name that a user read when connect from telnet to my server ? (SMTP and POP3 and other services )
Example for SMTP:
$ telnet x.x.x.x 25
Connected to x.x.x.x
Escape character is '^]'
220 mailtest.example.com ESMTP Postfix
I want change "mailtest.example.com" when other name.