But I get emails on both units. My accounts are set up the same. Will setting this up as imap help to alleviate having to delete them individually from say iPad if I read them on iPhone and delete them from iPhone.
I don't believe Comcast offers IMAP email. I suggest you switch to another email provider, i.e.Gmail, Yahoo, etc. Personally, I use Gmail and it works very well. You can forward your Comcast email to your new provider as long as you like.