Users and plans need demystifying

Users and plans need demystifying

As far as I can tell we have a free plan on mail. Does this mean we must pay for additional users? What do we get with addit users? Do they each get their own mail box? 

Currently our three people (all partimers) use the same mail and we filter incoming messages so they are all sent to the appropriate mailbox, which works fine. Unfortunately outgoing mail usually goes out with my name and return address on it because people keep forgetting to use the templates we have set for them so a sent email shows their name and return address.

So would addit users solve this problem?

Greg Aanes
2109 Queen Street
Bellingha WA USA