David:
The way I look at it, a list server has two components: It creates an arbitrary email address for your domain and it also allows you to use that email address to send to multiple users.
To replace both these components, you will need to select a user that you want to use as a catch all email address. This can be an already existing user or a new user. Any user can have multiple “short names" or "aliases". A short name is a name they can login with and also receive email at. For example, create a user called listman. Its email address would be listman@yourdomain.com. Now lets say you want to have other email accounts like sales@yourdomin.com and info@yourdomain.com. You can add “sales” and “info” as Short Names or Aliases to the user listman. This way any mail sent to sales or info will go to listman. To do this, using the Server app, go to Users and right click on the listman user you created. Then select Advanced Options and add sales and info to the Aliases field, separated by commas. Now listman will receive mail when sent to listman, sales, and info.
The next component is to distribute that mail to the other users. The way I do that is to use the Mail app. Pick a computer that you can leave up all the time with the Mail app running. Create an account for the listman user, so the Mail app will receive all that user’s mail. Then setup rules to distribute the mail to the people you want. To do this (after setting up the user's mail account), go to Mail > Preferences > Rules > Add Rule. Fill out the fields like this: Description: Sales, if ALL of the conditions are true, To Contains sales@yourdomain.com, Perform these actions: Redirect Message to user1@yourdomain.comuser2@yourdomain.com. Then add another rule for info, and so on.
So by doing this an incoming message send to sales@yourdomain.com will be sent to the user listman. Then, the Mail app will redirect this message to user1 and user2 as long as the Mail app is up and running all the time. I know, not the best solution, but it works for me until they get it fixed.
It is important to use Redirect instead of Forward. This is so that you maintain the original sender in the email. Otherwise, it would say it is sent from listman. Also, Redirect properly forwards attachments and Forward does not (for me anyway).
