>>>When doing my class reunions and other similar events, I'm the photographer, and I usually put up the photos in a folder on dropbox, click share on that folder, copy the link and then paste it in an email that I send to everybody. They just click it and get to see the pictures. And, mind you, most of them are not IT (just 2 or 3 of them, fellow mathematicians :), and are just as old as I, i.e. semiliterate in IT matters.
>>>
>>>Now your guy may not be semiliterate.
>>
>>I did a test. Shared the file to with myself (I have a second email address). I received an email on this address prompting me to download the file (that I shared). But it (dropbox) also asked me to log in using dropbox, FB, or Google account.
>
>Try this link: https://www.dropbox.com/s/otaixx2ogdubf14/E70_15287~20190502_13_09_30.jpg?dl=0 and see how that works.
>
>I did not use the share feature, but the create link, which is under "..." and there when it created a link, used "copy link" - then selected, copied to the clipboard, pasted here.
>
>Those share things are mostly designed to get new members, some of which may at some point like the service and wish to go for a paid version. That's business. The simple links like the one above aren't exactly highly visible, but still exist.

I just tried copy link and it works on Chrome but on IE it still wants me to log in. I will try this approach, link, with this friend.
Thank you.