Thanks for the reply, what a shame that Microsoft's flagship email software, with 20 years or so of developments and updates, is beaten by a free app on my phone (which does support POP3 TLS fine)!
I've been updating all of my local machines to use more secure POP3 email authentication, something I really should have done some time ago, but Outlook seems to be the stumbling block. I thought about using IMAP, but I am concerned that this basically implies
server-side synchronised content management.
To explain: I have several PCs and phones, all of which download emails from the same POP3 account. None of them delete any content from the server on local deletions, and my 'master' machine is set for Outlook to purge the server's inbox of everything in
the inbox over 60 days old (by which time all of the devices will have picked up the emails).
It is my understanding that IMAP will try to re-synchronise all of my separate inboxes when messages are deleted from the server after 60 days, which I
do not want. I want to manage each inbox independently (the phones only keep a week or two of back messages, the laptop rather longer, and my main PC keeps everything locally, unless I happen to manually delete it).
If I use IMAP just for the available security aspect, how can I set it so it behaves similarly to POP3 in that the server and my various local inboxes are purged independently of each other? (i.e. the server auto-deletes after 60 days, but the various client
machine inboxes are configured to have different local retention periods).
Many thanks for your help,
Andre