Cant configure email settings

I can realize why it says: Error saving properties
And also 'Test outgoing email' says nothing.

Hello Sergey,

Could you expand the browser console (F12), click the Save button again and provide the list of errors and notifications from the console?

EmailSettings.aspx:1 XMLHttpRequest cannot load newportal/servicedesk/_vti_bin/P … 2432351148. Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘http://newportal.storm.local’ is therefore not allowed access. The response had HTTP status code 401.
plumsail.helpdesk.settings.syncwidget.min.js:1 error


Are there any suggestions?


Most likely, alternative access mapping is configured improperly:

As I see, you opened the site using FQDN (newportal.storm.local) but SharePoint still interprets it as newportal - this is the only mapping you have.