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themcgruff
on Jan 31, 2012
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Giving away the secrets of 99.3% email delivery
It's not worth outsourcing. We just add a tiny gif that has a unique hash. When that file is requested record the hash and mark the identified message as read.
archangel_one
on Jan 31, 2012
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Seems like most e-mail clients these days don't load remote images automatically - do you find that significantly affects this technique?
jeffclark
on Jan 31, 2012
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The hashed image is the same method the big boys would use to record open rate.
archangel_one
on Feb 1, 2012
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Ok, but surely they have the same problem then?
omonra
on Jan 31, 2012
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Thanks - is there a library I can use? Wouldn't want to reinvent the wheel
themcgruff
on Jan 31, 2012
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I'll talk with Noah about open sourcing it. Right now it would take a little bit of effort, but it's probably worth it for the good of the community.
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