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Tag: cache

Gmail image caching update

Late last year Gmail started caching images on their servers, breaking open tracking in some circumstances. This image caching was good for senders, in that images were back on by default. But it was also bad for senders because it broke dynamic content and didn’t allow for tracking of multiple opens by the same recipient. […]

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Gmail speaks on image caching

Gmail released a blog post last week discussing their new image caching and why they implemented it. The short version is this is a way to improve the gmail user experience by screening images for malicious activity and serving the images faster from the Google caching machines.

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FAQ about opens and Gmail caching

I had hoped to blog about something else today, but this still seems to be a big concern for a number of people. There are a lot of questions running around, some of which we don’t have answers to, others of which we have answers based on some evidence. It’s important to remember that we’ve […]

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More info about Gmail image caching

A lot of people are discussing the new Gmail image caching around the web. This doesn’t yet appear to be rolled out across all of Google’s network, so some people in different parts of the world are reporting different behaviors. This is leading to a little bit of confusion, as folks are reporting things like […]

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Flush your DNS cache (again)

This time it appears that DNS for major websites, including the NY Times, has been compromised. Attackers put in DNS entries that redirected visitors to a malware site. The compromise has been fixed and the fake DNS entries corrected. However, people may still have the old data in their DNS caches and security experts are […]

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