I have two Moodle installations on the same VPS. Both are Moodle 3.9.1 (Build: 20200713)
The Moodle Email settings for the Outbound SMTP server configurations are identical and correctly saved.
One site one I can test the email connection and delivery without any issue. On the second installation I click the "Test outgoing mail configuration" and enter a valid email address and click send test message - nothing happens. The page begins to reload, but no error message is displayed. No failure to connect to STMP host - no information at all. Eventual the page loads without the Test outgoing mail configuration items. I have turned on the debugging and don't get any messages.
Any suggestion on how to troubleshot the issue?
Thanks