4 ms·
What’s your method of detecting tracking pixels? Is it just as simple as scanning for size 1x1 images? I mean this as an honest question. I don’t really know v
by CogitoCogito 5y ago
What’s your method of detecting tracking pixels? Is it just as simple as scanning for size 1x1 images?
I mean this as an honest question. I don’t really know variety of tracking pixels out there. Are there other similar things one should block?
- dheera 5y agoI would just block all images loaded from external URLs, since any of them could be used for tracking, but the newsletters are less my concern, it's more the individuals that I would be concerned about, and they tend to be a almost-fully plain text e-mail with a 1x1 image from one of many well-known domains for tracking.
- sgarman 5y agoSince it's an email isn't every image from an external url? Do you just mean blocking all images?
- collinmanderson 5y agoEmails can have "inline" attachments, where an image can be attached in the body of the email itself. So the image shows up without any network access, but it's generally base-64 encoded (costing 4x space) and ends up using a lot of email storage space.
- sfoley 5y agoBase64 costs 1.3x space, not 4x.
- collinmanderson 5y agoOhh, I was thinking 256/64 = 4x, but it's apparently it's 8 bits / 6 bits = 1.3333x. Thanks. Plus for email a little extra for a =\r\n on every line, so more like 1.4x.