Cannot view Email body or access Contacts, Calendar, Tasks & Options

[jasonfenton]

Hi there,

I am having a problem with webmail.
All of a sudden I am unable to view the message body of an email in webmail.
The message body flashes, then disappears.

Also, strangely, the Contacts, Calendar, Tasks & Options pages cannot be view either.
It shows the message, webmail.intervations.info refused to connect.

I have checked all the settings, and nothing seems obviously wrong.
Does anyone know what could be causing this?

[jasonfenton]

Issue resolved.

Ended up narrowing down to,
Refused to frame <url here> because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'none’”.

Removed this from IIS on the primary mail domain for the server and the issue resolved itself.