Email storage

Thanks for your helpful response. I now understand that we will lose our stored BT emails once we cancel our contract with them unless we do something about it. You are correct that for £7.50 per month on a rolling 30 day contract you can keep BT premium email with no broadband account but we are reluctant to do that unless there is no alternative. What I didn’t quite understand is how to move messages by creating new mailboxes and how this would store BT emails for future use once our account with BT ended. In Mail, I currently have 6 Mailboxes - 1xiCloud, 3xBT and 2 new Gmail inboxes, which I recently created because of our possible departure from BT. Within each Mailbox there are the standard folders, inbox, sent, junk etc but within the 3 BT Mailboxes I have added multiple other folders in which I store particular related emails that I want to keep permanently. It is how I move these to some permanent storage that I am not clear about.

I created a ‘BT Archive’ mailbox within the ‘Gmail’ mailbox as you suggested and then tried to move the contents of one of the folders in one of the BT mailboxes to it. However, I found that I could only move it to other folders within the same BT mailbox and found no way of moving it into any of the other 5 mailboxes.