deggie, the OP didn't mention ANYTHING about modifying from defaults until his fifth post. He talked about emails deleting when he didn't want them to. So, OBVIOUSLY, he hadn't modified the settings... oh, until he mentioned that he had.
The default of any conversation should be about the default situation. Do I need to nitpick about how many conversations on this forum assume the default, until the OP says differently?
Even you said: "If you delete an email from any device with IMAP it deletes if from the server. Don't delete it if you need to keep it."
Oh, but why didn't you clarify that was only the case if you were at the default settings? You didn't specify you were talking about the defaults, either. Why didn't you allow for the possibility that the OP had adjusted his settings.
It wasn't until his FIFTH post that he mentioned that he had adjusted his settings. Until then, it was reasonable to assume (as both YOU AND I did) that he was using default settings. Especially with him talking about emails deleting when he didn't want them to.
Based on what the OP had said up until that point, he was using POP in default settings and not understanding the adjustable settings. But lo and behold, he then posts his settings... which still show the 'leave on server' unchecked.
But, hey, that's okay deggie. You get to make an assumption about what the OP meant, but I don't... even when it was the same assumption. Hmmm. Classy.