Davoud wrote:

You just don't get it. In the referenced message iCloud is nothing but
an email address. It meets all cross-platform standards and has aught
to do with where the photo was hosted.

Ah ha, that might be the issue. If the image is remotely served and not
encoded and attached to the email gmail may be blocking it. I don't ise
webmail so not sure about it. Thunderbird surely will block it, it does
by default. You must white-list it. Remote content is a security risk.

--
Take care,

Jonathan
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