Linux install E-mail server and make test

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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-6ac96682da127406918189-i/]  -f from a different console. Using telnet is easy
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Command line send mail
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Postfix configuration
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