This also applies to any third party apps being used on a device as well.
Just been with a client today using a Synapptic Tablet. She had trouble with her emails which we eventually found out was caused by Google blocking the email function on her tablet.
Solution:–
Need to go Security settings on the google account concerned and do the following
– setup two factor authentication which will need a smart phone or mobile phone for a text message
– next go to security and go to “Third party apps with account access” and add “Synapptics” to the list
A 16 digit code will be generated which needs copying down or taking a photo of. It’s a one-time code that you type into Basic Email Settings of Synapptics ( synapptics doesn’t allow pasting into the password area !) under Password.
I used IMAP settings with port values Incoming 995 and SMTP port settings of 465. You can find these on the web if needed. I set them in Synapptics under the “Advanced settings” in Email.