2 ms·

I thought that 99% of the images included in emails for tracking purposes are single pixel transparent GIFs - so no biggie in working out which ones those are..

• martin-adams 13y ago
  Then they switch to two-pixel transparent GIFs as a workaround.
  • cstrat 13y ago
    god damn marketing geniuses.
• vidarh 13y ago
  In the e-mail campaigns we send every image is a tracking image. It all just goes into our log files an is then post-processed, so the additional cost of processing every image is minimal compared to the rest of the cost of the send. Using a separate tracking pixel is pointless unless you for some reason want to let some third party track the opens (which some people might, e.g. to prove certain open rates)