Sending Large amounts of large .jpg images?

I've been using Adobe Send for 5 years to send 20-40 large .jpg images to my clients that average around 60mb in size by compressing them in "ZIP" folders. Lately, after getting error messages I was told by an Adobe troubleshooting tech that I can't do that and must send them as one .pdf doc or individually as .jpg. Sending individual images is way too cumbersome for my clients. Can they easily convert a .pdf to .jpg without loosing any quality and do it conveniently, or is there a better way to send them in one folder?