[MlMt] Trash or Deleted Messages?

[Scott A. McIntyre]

Hi,

This is one that has been bugging me for a while and I keep pushing it 
to the back burner, only to have it flare up at inconvenient times..

I use:

o  OS X
o  iOS
o  Fastmail

I am pretty sure there are others on this list who do the same.

What is the "right" way to configure MailMate (and, by association, 
Mail.app on OS X and iOS) so that deleting a message puts it into the 
right folder such that all of the various interacting software see that 
folder as the rubbish bin and treat it as such?

Some of my configs seem to be using a Deleted Messages folder, others 
are using Trash; I'm hoping to go with what should be the "default" but 
I'm sensing that there's a fundamental difference between these 
systems...

Ta,

Scott