Mozilla bought the excellent Android email app K-9 (which didn’t include any trackers) and integrated trackers as part of #Mozilla‘s rebranding under the #Thunderbird name.
They even made it opt-out instead of opt-in. Their defense for breaking the law: ”we wouldn’t have enough data if we obeyed the law.“
It doesn’t matter whether you ”anonymized“ the data or not: If you want to extract data from someone’s device to yours, you may do so only if they knowingly consented.
https://social.tchncs.de/@kuketzblog/113244035577912640