Chucklepvfc:
Internet standards keep evolving.
In fact, there was a new, official Internet protocol standard this month!
Some companies, like Apple, and others, keep up with the Internet protocol standards, some, whose name shall not be mentioned, “drag their feet” in coming into compliance with new standards.
Additionally, the Internet protocol standards for email are designed for human-to-human communication, which may not, necessarily, align with the use-case of trying to use email to transfer images/pictures to other computer systems.
However, that being said, none of y’all would be having these issues if it were not for the way Microsoft Outlook disallows bulk attachment operations (such as bulk-saves) based solely upon how Outlook chooses to display (render) your received emails!
As far as any of us has seen, so far, Microsoft Outlook is the only email client that misbehaves in this manner.
Unfortunately, Apple has no control over Microsoft’s products.