[MlMt] Collecting Spy Sheets: CSS allows user tracking in emails

[Robert Goldman]

I tried creating a bundle that specifically identified the 1px tracker 
images and updated Little Snitch to block them, but I never got it to 
the point where it did this automatically enough to avoid being a burden 
to me as a user.

If anyone's interested, I will find that code and make it available. 
Maybe someone else can finish it, or at least suggest an approach for me 
to take.

On 5 Mar 2025, at 7:19, Benny Kjær Nielsen wrote:

> On 5 Mar 2025, at 1:11, Michael Nietzold wrote:
>
>> Is MailMate safe for Collecting Spy Sheets?
>
> MailMate should block everything, but I'm naturally interested if that 
> should fail in any way. If you allow fetching external resources (in 
> general or for a specific email) then MailMate does not protect you in 
> any way.
>
> You might be interested in the following service which you can use to 
> test both MailMate and other email clients: 
> https://www.emailprivacytester.com
>
> ---
>
> I just tried it and the test-email triggered 0 “vulnerabilities” 
> in MailMate and it triggered 12 in Apple Mail.
>
> ---
>
> In general, I don't guarantee anything since people come up with some 
> really smart tricks -- and some times I introduce new bugs. Quite a 
> lot of MailMate users seem to also be using Little Snitch and someone 
> will usually write to me when the latter happens :)
>
> -- 
> Benny
> https://freron.com/support
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