I have transferred all the emails that I want to keep into iCloud mailboxes that I have created. Are the files now on my iMac or on the iCloud server?
All my addresses appear to be IMAP accounts.
I now only use my Mac email addresses to simplify everything. I no longer have a use for the original btopenworld addresses that I set up with my ISP. I do not however want to lose the original btopenworld addressed emails that I have saved to the iCloud mailboxes that I have created. Is it therefore safe to delete the addresses.
Thanks for your help.
If the folders (mailboxes) are on your iCloud account then they are saved. Log into iCloud and you should see them online.
If you see them online, it's safe to delete the btopenworld email.