I had to stop using WordPress's native image handling because I quickly exceeded the space they provide. So, I started embedding images from Flickr with the "Flickr embed" block, instead, which solved the space problem.
For some readers, however, their email client, mostly on iphones, rendered the image aspect ratio wrong in the copy of my posts that WordPress emails to them.
In an attempt to fix that problem, I'm now trying to use "custom HTML" blocks to embed images. It solves the aspect ratio problem for the readers that had it, but for some other readers, they only see a URL for the image, not the image itself.
Here's the HTML I am using:
<div style="text-align: left;margin: none">
<a href="https://www.flickr.com/photos/andrewdressel/54910258108/in/album-72177720330195229/" title="DSCF1630">
<img src="https://live.staticflickr.com/65535/54910258108_aa0c906e85_o.jpg" width="800" height="auto" alt="DSCF1630" /></a>
</div>
Here's a URL to my test post:
https://signsoflifeinestabrookpark.net/2025/11/08/image-handling-test/
One reader who reports the new problem says that she is "using Google Chrome on iMac running Sonoma 14.6.1"
Any ideas why this works for some and not others? What should I try next?