Unable to send emails from google account

Goodday, I am unable to send emails from manager. Error message is “The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required. Learn more at”"

All parameters have been accurately inputed and still getting error message…
Email address
cran. . . . . . hub@gmail.com
Send a copy of every email to this address
Cranfield Business Hub and Consulting
Paper size
Email sending format
SMTP server
SMTP credentials
Show password

Read this Guide: https://www.manager.io/guides/9100. Follow all relevant links in the Guide. If you still cannot resolve the problem, furnish all the information requested by the Guide. Show a screen shot of your Email Settings page, not a transcription. Obscure only proprietary information.

you should be including more information like, what version of manager you are using, what environment etc. But as @tut said, make sure you’ve read the guides and post more pertinent info for people to help you.

This looks like it’s going to be a 2FA or Google Apps Authentication issue. What have you done further to diagnose your problem?