At the bottom of each email sent out from groups.io is a link to mute a topic.

If a topic is not interesting to you, please feel free to use that link to mute it and you will not receive emails concerning that thread.

Thank you.

FYI...The "Mute This Topic" function works well for those that consume the group via email.  There is also a "Mute This Topic" button for each topic when accessing conversations on the groups.io website.  Neither button, however, will mute topics for those that consume the material on the groups.io website.

73, Andy