A: Make sure Neutron is downloaded and installed from here. Check if e-mail account is listed in Neutron's settings -> Help -> Account. If not, try adding it via OS settings as POP3/IMAP e-mail account. If it does not help, account is already added but Neutron does not see it and Neutron has permission provided to access device accounts, then you could try adding account manually via Help -> Account -> [+].

See examples below how to add e-mail account details.

Also make sure that access to the account via POP/IMAP protocol is enabled in the mail service settings:

• 163.com (use authorization code if password for e-mail account does not work, instructions here)
• 126.com (similar to 163.com, enable POP/IMAP access explicitly for account, instructions here)
• QQ.com (more details here)
• Gmail.com (you will need to enable access for a Less Secure Apps which can be disabled after a license check: http://myaccount.google.com/lesssecureapps)
• Yandex.com
• Yahoo.com (generate password for 3-rd party app access, use IMAP)
• Me.com
• Outlook.com
• Mail.ru

Note:

• If Neutron failed to validate account the account list entry will become yellow.
• You can disable IMAP/POP3 access for your e-mail account if license check succeeded (when you see red dot on your e-mail account in Help -> Account list).
• If you reset Neutron's settings you will need to account details again.

Example: