Remove [SPAM] from the header of an email

So I spent a good portion of a day trying to figure this one out.

And it was resolved in roughly 30 seconds!

To fix it you should have a mail server and Eset Mail Security.

Eset mail security is causing the message [SPAM] to appear in emails.

To resolve this disable AntiSpam protection.

- Press F5 in Eset Mail Security

- Then untick AntiSpam Protection

Both at the top and bottom

Screenshot below: