I've had the email configuration page set up to email me via my yahoo account for several months. A few days ago, it stopped working with this error:
"Send email summary report error: Failed to send the email summary report. Reason: 530 5.7.1 Authentication required"
I decided to try usign my gmail account. I set the outgoing account to "smtp.gmail.com" and added my info. I attempted to send a test and I get this error:
An email report configuration error occurred.
The cause of the error was: 530 5.7.0 Must issue a STARTTLS command first. l65sm30170100yhk.1 - gsmtp
I changed the outgoing account to "smtp.gmail.com:465"...that does not work either.
From Admin Guide:
"NOTE The VDP email notifications and reports do not support ... SSL certificates"
One possible solution:
"Restricted Gmail SMTP server (aspmx.l.google.com) - Port 25, TLS not required, mail can only be sent to Gmail or G Suite users"