[MM3-users] how should I implement multiple domains for receiving emails to a list

Hello to all:

I think I have resolved almost all of my issues. Thank you for your coaching. You are all super heroes.

I have two domains: systemdatabase.ca, systemdatabase.homelinux.com

All my lists should be on both domains. So h@systemdatabase.ca is the same list as h@systemdatabase.homelinux.com. I found this was the mailman2 behaviour on my old CentOS 7 installation and I am accustomed to it.

I edited /opt/mailman/venv_mm/var/data/postfix_lmtp directly. Duplicated and edited all the lines. And compiled with postmap /opt/mailman/venv_mm/var/data/postfix_lmtp

I sent a test email. This appears to work.

Is this the best method to achieve this goal? What would you recommend?