Deleting is not enough, you have to make a sync afterward and you will see the mail disappears from the deleted box as well as removed from the server.
I personally prefer to empty my delete box manually just in case I want to take one mail back from mistake soon after.
Anyway, I didn't find any "remove or keep on the server" option in the settings. I understand Mail App isn't intended to be a very sophisticated mail client, but this option exists in the simplest ones.
Let's say I keep some of my mails on my desktop PC, I then go travel with my laptop to get the last mails and..... I download first all the previous mails saved on my desktop where I have no "remove from server" option!!!!!
So far I have kept Live Mail on my desktop.
Thank you for this explanation.
That is so silly,especially that you can not sync all the accs you have in Windows mail at the same time,with only one click.
I have 9 various accs,and I have to manually sync each and every one of them.
Well done Micosoft !!!