When the HTML Sanitizer module acts upon an email to remove malicious scripts and tags, the Dashboard logs would not show this information but the actions taken will always be logged in the debug logs.
The procedure described is applicable to the various forms of email encryption such as Office 365 Encrypted (Secure) Messages or Cisco Secured Emails (Registered Envelope Service, also called SecureDoc). This article describes a solution to this problem that is caused by the HTML Sanitizer or the Email Exploit Engine scrubbing the encrypted attachments for malicious tags. Received encrypted emails have their links, images, or scripts removed even though the UI logs show the message was processed as.
Recipients of Office 365 Encrypted Emails will sometimes receive HTML attachments having broken links or HTML scripts removed from the encrypted attachment thereby making them unable to access the encrypted emails.
