eNewsletter Stopped Sending

eNewsletter has stopped sending. It is set up to use SMTP via GSuite. I have double checked the settings, and everything appears to be correct as per Google's specs for smtp. When I try sending a test message I get the following:

Failed to send test email! - Please check your outgoing email settings and server config to see if selected ports are open. Error details: The following From address failed: info@ebb.dance : Called Mail() without being connected

support access has been granted. Please help me get this resolved quickly.
Thanks!