Share photos by uploading the image to an online server and email the link.

This is how NOSTR works, your image is uploaded to a single media server and the link to it is embedded in the post.

If you email a photo to say10 friends, you've sent 10 copies of that image to 10 separate mail servers and wasted 10 times the amount of storage. Those mail servers now have to read through your entire image just to read the email into the index so you are still able to see the headers in your mail client.

DON'T DO THIS.