Rainloop web client used by Disroot and some others defaults to not showing images and needs you to click a button to display them. IIRC Protonmail is the same in its webmail.
The only non-web client I've used much in recent years is aerc, which is basically covered under "mutt" in this case.
Re:Can I Email?
by slaymaker1907 on Tuesday May 11, 2021 @01:48AM
(#27114645)
My corporate Outlook email client does not show images by default if the sender is external.
Remote images are a crime, break the ability to search ofline or keep a record of ones conversation but they have one key advantage for brands which is to spy on you.