The mailing list for listmasters using Sympa

[VTR <address@concealed>]

I confess, I am weak on Linux and mail routing and but have been tasked with setting up Sympa for my company.

We have an Office 365 tenant with MX pointing to it. Let’s call the domain example.org. All mail gets delivered to it.

My company wants to set up a Sympa server for mail list management.

I installed Sympa on a variation of RHEL, installed SQLite, installed Sendmail, and am stuck here.

What value do I use for domain, since the primary is pointing to O365?

Do I set up a subdomain, like mail.example.org, and, if so, what DNS records do I need?

Sorry for newbie questions!

Thanks!