Although I have used the wizard to set up PostSMTP and test email was delivered properly, I still see “Postman is?not?configured and is mimicking out-of-the-box WordPress email delivery.?” and notifications from Pinpoint Booking are not being delivered. Depending on which mailer I try, I get a different failure message, but generally,
Notification test email could not be sent.
Mailer error: Could not instantiate mail function.
Could not instantiate mail function.