On 08/24/2017 01:21 AM, Steve Petrie, P.Eng. via talk wrote:
3. If someone isn't using a cloud-based email IMAP hosting service, but instead using a POP3 / SMTP hosting service and keeping emails on local disk (as I am), dropping Microsoft Windows means converting the local MS-based email database to a new email client. Yes, Mozilla Thunderbird can import emails from MS Outlook and MS Outlook Express (but only when Thunderbird runs under Windows). But frankly, I have too much invested in my precious 1.5 GB of email history to trust the standard Thunderbird import function. So I have written my own C++ program to generate solid conversion integrity checking for the email database conversion. Call me paranoid. And this C++ program isn;t fiished yet.
Get going with IMAP. Then you can drag 'n drop your POP email into an IMAP account. If fact, you don't even have to do all that. Just create a new IMAP account and stop the POP account from downloading mail. Have sending save outgoing mail on the IMAP account too. That way, you can refer back to the POP messages when needed, but use IMAP going forward.