Silly postfix question

My domain is:

mail.luauapps.com

I ran this command:

sent an email with s-nail

It produced this output:

the email was received successfully

My web server is (include version):

postfix

The operating system my web server runs on is (include version):

ubuntu 18.04

My hosting provider, if applicable, is:

NA

I can login to a root shell on my machine (yes or no, or I don’t know):

yes

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):

no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot):

0.31.0

Um, silly question, I know, but when I authenticate with https, I know it’s authenticating because there is an S at the end HTTPS and there is the padlock icon next to it. How do I know my email is successfully authenticating.

I know next to nothing about email server administration, so thanks for your patience.

A simple way can be to use https://starttls-everywhere.org to check the domain where you receive email.

Though I noticed that mail.luauapps.com doesn’t have a DNS record at all, so you wouldn’t be able to receive any mail to @luauapps.com at all right now.

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