I have a Comcast mail account. It has A LOT of mail in it. I would like to go thru it and delete lots of stuff. Comcast's web interface is not great for doing this. Mac Mail program would do a fine job with this, BUT Comcast is POP3 only, so any changes I do would not be reflected on the server, as it would be with IMAP. I DO NOT want to download everything into a client program. So, is there a mail client that will let me access the mail in the comcast account, sort/delete with ease, which will be reflected on the server when I'm done?