That's the problem. They don't animate in QuickLook or Safari nor do they animate when sent on. The sender checked out the site where they all originated and the originals ARE animating - both the one's that animated and the ones that didn't in the email I received.
BTW, I find that they will animate on my MBP w/ Snow Leopard but not on my iMac w/ Mavericks.
I found this online.
Use Preview to play animated GIFs
Apr 08, '03 10:23:00AM •...