Are you receiving duplicate email when checking two or more pop3 email accounts with Microsoft Outlook?
Microsoft explains this is a known issue here : You are prompted for your password, and you may receive duplicate e-mail messages if your profile has two POP3 accounts in Outlook
A troubleshooting step that you can try and isn't recommended above is to make sure your AV software is not causing timeouts while your email is being downloaded.
A additional workaround is to check with your ISP and see if they support IMAP accounts.
Microsoft explains this is a known issue here : You are prompted for your password, and you may receive duplicate e-mail messages if your profile has two POP3 accounts in Outlook
A troubleshooting step that you can try and isn't recommended above is to make sure your AV software is not causing timeouts while your email is being downloaded.
A additional workaround is to check with your ISP and see if they support IMAP accounts.