[Evolution] Recommend instructions for detecting mail tampering program? I get "Mail authentication request" every computer start.

[Lee McKusick <leemck gmail com>]

Hello Evolution List,

        Can you suggest to me instructions for detecting a mail tampering
program or instructions for attaching a computer running an ethernet
packet program to determine if my email traffic is being altered by some
kind of man-in-the-middle process?

        For the past year I have been having popup windows titled "Mail
Authentication Request" coming up every single time my Ubuntu computer
starts. Often times the Mail Authentication Request popup appears before
another popup titled "Unlock keyring". 

        The popup "Unlock keyring" contains my user password (which is also the
root password since this is a Ubuntu system).

        I am pretty sure Evolution can't do email until "Unlock keyring" is
passed. This seems odd, why does Evolution ask me for these very very
important email passwords over and over? 

        In the past, I mean over 1 year ago, Evolution never lost email
passwords. Speaking about the status of Evolution a year ago, I simply
never had to retype my email passwords. No I seem to have to retype them
every single time I start the computer. When the "Mail authentication
request" pops up I can't access a terminal screen to look up passwords,
which is a big annoyance because my passwords are long and hard to type.

        Something strange is  going on. I have run top and I don't see any
strange process names. I also don't think a hostile intrusion is  going
on. I have not had my email accounts used by a hostile party. The
rootkit hunter program doesn't find any problem.

        Therefore, I ask you for suggestions.

        I have been running Evolution 3.10.4 as part of an Ubuntu 14.04 LTS
computer for way longer than 5 years. This is a modest low power Wind pc
talking over ethernet eventually to a garden variety cable tv internet
access.

Cordially yours, Lee M.