Answer
PROBLEM
GFI MailEssentials notification emails are blocked by GFI MailEssentials, such as this notification:
-[SPAM] - Administrative Notification: GFI EmailSecurity detected a threat. - Found word(s) order now as seen on in the HTML body."
ENVIRONMENT
- GFI MailEssentials
- all supported environments
SOLUTION
- Open GFI MailEssentials configuration
- Navigate to the following tab General Settings > Settings > Local Domains tab
- Remove any .LOCAL domains from list of local domains
CAUSE
Inclusion of the .local domain in General > General Settings > Inbound Email Domains was causing the email to be blocked.