[Evolution] Mail in Evolution disappearing

[dave boland <dboland9 fastmail fm>]

Since I upgraded to Ubuntu 15.10 (Evolution 3.16.5), the mail in the
list disappears after about 3 months.  I was looking for a Preferences
setting or anything in the documentation, but have found nothing.  I
really need my e-mail back, so help would be appreciated.

NOTE: I am looking at "All Messages", not any of the other options.

Dave,
-- 
  dave boland
  dboland9 fastmail fm

-- 
http://www.fastmail.com - mmm... Fastmail...