Just recently, without intervention, the SMTP settings for a clients DNN install is failing. I can log into her gmail account fine, but setting up the SMTP in DNN gives an error:
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required
Im using smtp.gmail.com:587 and using SSL connection... still get the same error.
Any ideas?
Tuens out to be a google apps setting to allow less secure apps to use Gmail.