I've installed the mailman on the system and see how you can create mailing list for a domain, which is great. However, I also noticed you need to add in the emails one at a time or via a memo field, one address per line. Most of my clients just have mailing lists for an branch office or someing, and really don't need all the features that mailman provide.
Is there wa what to create a list e.g. firstname.lastname@example.org, that searches the email accounts for that domain and populate from a list, that a user can simply select? Or do a *@domain search and then just check which users are part of the list?