Security & Compliance Malware Quarantine HTM attachments Nameless.htm

Phraramond I believe one instance where this issue happens when the sender is using Apple Mail.  If they place their attachments In-line (In the middle of their text) the text after the attachment will be sent as an htm attachment.  If they have images in their signature, that can cause issues also.

I don't own any Apple products to test, but from my research the Apple mail sender can select Edit > Attachments > Always Send Windows-Friendly Attachments; and Always Insert Attachments at the End of Message.

Good luck trying to get an Apple user to alter their email attachment behavior to work with what they consider an inferior system (Anything not Apple). They do not care and they will find another company to do business with that doesn't block their emails. (Until that company gets ransomware, that is.)

I have raised a ticket with Microsoft (Which they closed without resolution.) to work with Apple to get this sorted out.  We can't have htm, html, or eml attachments in this day and age.  We need this issue to get addressed.