I know the short , best answer is use Imap or hosted exchange.....but....
Are there any 3rd party apps or services that allow pop3 email (in Outlook) to be synced to phones & tablets?
Ive had a few people wanting to do this, have their outlook inbox & sent items Folder be somehow veiwable/synced on their phone.
This is for old ISP based email adress's . eg ihug.co.nz, xtra.co.nz etc
The other issue is of course, the 5-10years worth of email in the sent items folder & in the pop3 inbox. Thats what they want access to via their smartphone .
It isnt that hard to have future incoming mail able to be downloaded to all devices, old email & sent items are the issue.
I'm reluctant to recommend IMAP, as newer versions of Outlook seems to have slightly buggy Imap support.