1397: Minor doc fixes r=Nebukadneza a=dgtlmoon
## What type of PR?
Documentation cleanup for the 'Mailu' setup at https://setup.mailu.io/1.7/
## What does this PR do?
Fixes spelling errors, grammatical mistakes and minor relocation of checkbox description text and styling, overall big readability improvement in the setup helper.
Co-authored-by: Leigh Morresi <dgtlmoon@gmail.com>
Co-authored-by: Leigh Morresi <275001+dgtlmoon@users.noreply.github.com>
Co-authored-by: Dario Ernst <dario@kanojo.de>
<p>In the next sections we need to set the postmaster address. This is a combination from the <i>postmaster</i> local part and the <i>main mail domain</i>.
The <i>main mail domain</i> is also used as </i>"server display name"</i>. This is the way the SMTP server identifies himself when connecting to others.
<p>In the following sections we need to set the postmaster address. This is a combination of the <i>postmaster</i> local part and the <i>main mail domain</i>.
The <i>main mail domain</i> is also used as </i>"server display name"</i>. This is the way the SMTP server identifies itself when connecting to others.
The Postmaster will get an e-mail address <postmaster>@<main_domain>. This address will receive the DMARC "rua" and "ruf" reports.
Or in plain english: if receivers start to classify your mail as spam, this postmaster will be informed.</p>