[MlMt] Setting up default address for GApps account

[Jan Erik Moström]

At work I'm currently trying out my universities GApps account to see
if it makes my mobile life easier. This means that I have an account
on the form

myemail at gapps.univ.edu

but my real official email address is

myrealemail at dept.univ.edu

and I've set up the GApps account to use "myrealemail at dept.univ.edu"
by default. But how to I do that for MailMate?

I've included the "myrealemail at dept.univ.edu" in "Email Address(es)"
for the account but how do I get MailMate to use it by default?