I trying to send email manually.But its not working its giving this error
An error occurred while sending ‘HTML Email Report - 8.2017-08-25.1.en.html’ to email@example.com. Error was ‘5.5.1 Authentication Required. Learn more at 5.5.1 Change SMTP settings to check Gmail on other clients - Gmail Help x124sm10317085pfx.65 - gsmtp’
any body can help to solve this error.