[MlMt] Download Images still downloads 1 pixel ones

[Randall Gellens]

On 9 May 2022, at 7:58, Sam Birch wrote:

> And as Randy said, the reason why MailMate can’t “strictly 
> block” 1-pixel images is that, in many cases, _MailMate has no way 
> to know the size of the image until it fetches it from the remote 
> server._
>
> For example, here’s an <IMG> tag from spam message I recently 
> received (re-wrapped for clarity, and domain changed to avoid being 
> tagged as spam):
>
> ```
> <img src="http://www.not-the-original-dom.ain/cljo8bq86/Cw4ear2u
> 2QPT6WIi5q6Mr2gNDEIIpk_24HKoK0Q7ulY/fSlEIVCxnTqw7304Z8k5-7DeoB8B
> TUDm4NmMX28zpyXKVfWsVIjfNzFFKOiXLw399vfpzvuSHfoXwZGLWvq6TfyuQPAJ
> OvdL7LOQ_tKLpSvPVXO1xJtHDimWEa5bpThzzWOgItSd6XMoWJdv7yKnLtzwcx3m
> -zrp7icAZ_1CAcg”>
> ```
>
> Can you tell that this is a 1-pixel image?
>
> Neither can MailMate.

The difference between "Blocked" and "Strictly Blocked" is that the 
latter uses a list of known-undesirable sources? Given this, I assume 
the purpose of the warning that a 1-pixel image has been downloaded is 
to let the user know that the message whose embedded images were 
downloaded contains obvious trackers? Yet, the message may very likely 
be from a "good" source but sent using a commercial mail distribution 
service which adds its own trackers. It would be more helpful if the 
warning would add the source of each just-downloaded 1-pixel image to 
the "Strictly Blocked" list. Sort of a "Fool me once, shame on you; fool 
me twice, shame on me" thing.
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