Outlook 2016 security no longer allowing VFP app to send emails as it did in the past

My client has Outlook 2016. At some point in the past, the Outlook version they had prior worked with the application that uses SMTP to send emails from it. I thought I recalled Microsoft tightening security over the years but that there was some (3rd party?) utility to get around the increased security blockage. Does anyone remember that and can comment on it?

Thanks.