Most major Internet service providers now require a special password for usage in third part mail clients such as SkyRoof.

To generate a third party password, you will need to log-in to your email account through a web browser and have the ISP generate a special password for you.

Here are references on how to create a special password for some of the major ISP's.

Yahoo: Generate and Manage a third party password

AOL: Create and manage third-party app passwords

GMail: Sign in with App Passwords

Created with the Personal Edition of HelpNDoc: Free Kindle producer