Linux install E-mail server and make test

[crayon-662fdba473ae5661574580/]
Create a virtual domain, and a virtual user inside that domain

Do a telnet to the port 25 of your server and send a mail to that domain and see if it’s delivered. You can check the error logs through [crayon-662fdba473aec945185550-i/]  -f from a different console. Using telnet is easy
[crayon-662fdba473aee007454730/]
Command line send mail
[crayon-662fdba473af1108829397/]

Postfix configuration
[crayon-662fdba473af3699255062/]