There appears to be an issue when using Debian 11 where spamassassin won't register to start at boot, and even in a post-install rebooted state, will not be running.  Perhaps I am incorrect, but I think this is a useful addition that makes sure this is all set up to operate as you intended.  I am not much of a systemd guy, but I think this is the correct way to do this.  It appears to work on a server I used this script on.  Please reject if superfluous or unnecessary.

Thanks for your work automating the "really fun" part of all this!

Typo in my last merge

Update emailwiz.sh

New line in the final output, looks way better!

use domain instead of @

Reset umask to 0022 at beginning of install

Fix: #178 leakage of public IP addresses in sent emails

Prevented escape shell

Some strings will escape and break the script, inserted fixes like single quotes ( ' ' ).

Update README.md

Replaced 933 for 993, the correct port for IMAP.

Fix: Opendkim won't start: can't open PID file?

Fix typo in LICENSE filename

Update emailwiz.sh

Make gmail's less angry

Update emailwiz.sh

Ubuntu can't run multiple lines without a special character, thus making the script malfunction, putting the commands on the same line solves the problem and the script can be used on Ubuntu 20.04

Fixes for custom subdomain names

Enforce TLS1.2 connections

Add extra troubleshooting points, minor readability changes