When setting up a home server, it is important to remember that is probably going to be used by every member of the household, so ensure that the entire system operates as expected.
Remeber KISS - Keep It Simple, Stupid
Train people on using it. If they have been used to hotmail/yahoo/gmail, they may not be famiiar with Thunderbird.
Introduce new features gradually, this will help avoid ”shell shock” as they are swamped by too much, too soon.