Suggest an alternative to

MailTrackerBlocker

Email tracker, read receipt and spy pixel blocker plugin for macOS Mail (10.11-13.x)

Why do you think that https://github.com/nextdns/nextdns is a good alternative to MailTrackerBlocker

A URL to the alternative repo (e.g. GitHub, GitLab)

Here you can share your experience with the project you are suggesting or its comparison with MailTrackerBlocker. Optional.

A valid email to send you a verification link when necessary or log in.