You might try sending with no folders, just separate files. And given the nature of the receiving mail server, you may need multiple e-mails with a few individual files.
Hi Ira, the folders contain respectively 21, 19 and 14 pdfs. I simply don't have the time to send each one separately. Nor the inclination.........
Your time and energy aside, I did not mean to send each one separately. Rather one e-mail with 6, 7, 10... individual single file attachments. By your tally above, this could still require a half-dozen or so emails on your part.
On a Mac since 1984. Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.