If you receive an error message when your trying to connect your SugarCRM with Gmail: The server response was: 5.5.1 Authentication Required. This resolution is for those of you who have tried everything possible and still, SugarCRM will not send the email.
The server response was: 5.5.1 Authentication Required.
How to Fix:
- Login into your gmail account which is connected to your SugarCRM account.
- Go to this link to turn on the access to less secure apps: https://www.google.com/settings/security/lesssecureapps
- Turn on the “Access for less secure apps
- You’re good to go!