For the longest time I was using POP mail with the built in Mail app. I would download all mail from the server and click the option to keep mail on the server that was less than 1 week old. After 1 week that mail would be deleted. I did this so that I could both download mail to my computer and also still see it in webmail and on my iPhone.
Recently, I converted to IMAP. I have spamsieve filtering mail and also have many Mail rules that sort messages into their respective folders on my hard drive. Is there any way to download my emails and also still see them in webmail and on my iphone? The second I download and sort the emails with rules they delete from the server.