how do i keep a copy of my messages on my mail server?

I’m using an IMAP server and I want to keep a copy of my messages on the server. I’m using eM client on my laptop and on my PC and some of my messages didn’t come through on my PC after I read them on my laptop.

Hi, IMAP does not deletes messages from the server. So please check your webmail interface if you are having all messages there and report me result here.

Jan