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Related to this question: Does Darwin block remote images from loading automatically? I find this is increasingly hard to find (Geary Mail comes to mind) and it's surprising to me.
Thank you for your question :) We block any and all code scripts/styles from executing outside of emails. We don't block images though - if we did then the emails you could usually receive with images will feel plain.. won't it? If I understand you correctly?
If I get an email with images it’s usually an email I didn’t want and I block the sender shortly thereafter. Real people don’t tend to send emails with images that are important for understanding the textual content.