Share a folder with photos with someone via Internet and Apple native tools
The less-friction solution would be to upload the compressed version of the photos. And then use iCloud file sharing. 

You can try Mail Drop. 


  With Mail Drop, you can send attachments up to 5 GB in size. You can
  send these attachments right from Mail on your Mac, the Mail app on
  your iPhone, iPad, or iPod touch, and from iCloud.com on your Mac or
  PC. All files types are supported and attachments don’t count against
  your iCloud storage. If a message, including its attachments, is
  larger than your Internet Service Provider (ISP) limit, Mail will ask
  you to send the attachments using Mail Drop.


Source:https://support.apple.com/en-us/HT203093