Great question Robert.
I’ve never really looked into how Postbox is doing it. I suppose they
have a blacklist of URLs (similar to what Benny implemented for tracking
links, even though he just put 1 URL in). MM could also make an educated
guess as to the size of the pixel and if smaller that said size, then
it’s probably used for tracking.
Having said that, I wouldn’t expect MM to bypass the tracking image if
the user has clicked load once. If it’s clearly stated (Postbox has a
different color in the banner) that there may be a tracking pixel and
the user still loads the image, then the fault lies with the user I
guess.
Cheers,
Pedro Lobo
On 9 Feb 2017, at 17:42, Robert Brenstein wrote:
Just to clarify. Are you talking about additional checking for
tracking images when the setting “Image blocking” is off, right?
Or do you mean to check the image size always, assuming that images
smaller than certain size are only for tracking and report not only
the count of blocked external references but also a count of suspected
trackers? Would you then expect the “Load once” function to have
an option to skip the tracking images when fetching images?
Robert
On 9 Feb 2017, at 16:19, Pedro Lobo wrote:
Hi,
I tend to mess around with a few mail clients to see what’s new and
around (and then come back to MM). One thing that I found in the
latest version of PostBox that I would love too see in MM (if
possible) is the inclusion of their [Anti-tracking
feature](https://www.postbox-inc.com/features).
In theory, MM could display the same dialog it does now, not showing
images unless we say it’s ok, but also indicate if said email has
tracking pixel in it._______________________________________________
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