Old title: Problem with e-mail attachments

I have Windows 10 and am using Windows Livemail 2012. I want to send a photo of mine as an attachment - but it gets blocked with a red message "Prohibited file type - this attachment contains a file type that is considered dangerous. The file has been deactivated" and the attachment will NOT send. However I have been able to send the same photo on a "photo album e-mail" - so I know the photo is definately NOT corrupted or infected.

How do I make Livemail allow me to send photos as an attachment rather than in a photo album cos I prefer to send photos as individual files ?