W10 - e-mails apps - Norton

As a migrant from Windows 7 (64 bit) to W10  (12 months) I have continued to use Windows Live (2012) for my e-mail service (from talktalk).

I believe it is about to reach obsolescence and I  think it is the right time to plan to ditch it.

As a user of POP3 protocol - it suits my daily needs with single PC for access - I have had little success with W10 Mail. configuration.

Seems I can send messages but can't seem to download / synchronise successfully . If I do manage to receive a message it does not delete as expected at the web server as it should for POP3 protocol.

Endless hours searching for a fix at the Microsoft end but nothing that gives a clue as to why it doesn't function correctly.

Looking for alternatives I have tried Mailbird - (no success either with POP3) and Thunderbird - (works perfect with POP3 protocol).

I am not necessarily looking for free options - like Thunderbird - but I don't rule it out . I am a bit unsure of  its Antivirus/Anti Spam  credentials.

Has anyone had experiences with any of these applications - or any others for that matter - regarding compatibility issues with Norton Internet Security.

Any help, advise or related experiences anyone ?  

Any recommendations of  alternatives or opinions would be appreciated.