I am so dense about IMAP vs POP that is a little hopeless, but my provider does not have an IMAP page, so to speak. They only have a webmail site where you have to sign in to each account separately, which means checking through many dumpsters when I'm not sure which email account contained the deleted message.
You may be "slolerner" but I am slow on the uptake. I long ago learned that when one assumes they are in grave danger of making a horses rear out of themselves and I am afraid I just did so.
you were using the Mail application on your MBP and its twin on your iPad to access your email. In that case there would be a group Inboxes, Trash, Junk, etc
where you can see all the messages in all of your accounts simply by opening Mail which automatically logs you onto all your accounts at the same time and if you do a search for a message the search function searches all of the accounts. Thus neatly solving your problem. Since you are using a web portal to access all of your accounts that changes the rules of the game entirely and IMAP would not really buy you anything.
Oh, and how do I get those suggestion BOXES to go away when I am typing in an address? I don't mind the suggestion list, it is good, but those boxes feel like Flash Cookies following me around.
Here I go assuming again, but assuming you are using a web portal those will be coming from
- Your browser's autofill function (that can be turned off in preferences)
- The browser history, or cache files (flush everything every time you use the browser)
- The host web site (look at the preferences there)
If you were using the Mail app those would be coming from either your Contacts (formerly AddressBook) or the list of previous recipients maintained in Mail.