Multiple email clients not in sync

[Marc Perkel]

Hello everyone,

I'm not sure if this is an issue with dovecot or my various email 
clients, or my settings.

I'm running 2.2.13 and I have Thunderbird on my desktop and K at mail on my 
android phone. In theory if I delete email on one it should delete it on 
the other. It does delete it on the server - but the other client isn't 
always "aware" of it. Same thing sometimes with read messages. I read on 
one device but the other didn't know it's read unless I shut down and 
restart the app.

Not knowing the details of how this all works I'm assuming there is some 
form of notification that goes on in the background so as to let other 
clients know what other clients do so they can sync up. And that where 
my setup isn't working consistently.

Maybe my expectations are just too high? Maybe I don't have things set 
up correctly?

What am I missing? Thanks in advance.