Truly Muting Gmail Conversations

You might have noticed that after muting a Gmail conversation it pops back into the inbox.

Google says:

“Muted conversations will only pop back into your inbox ready for your attention if a new message in the conversation is addressed to you and no one else, or if you’re added to the ‘To’ or ‘CC’ line in a new message.”

If you find conversations are popping back into the inbox you can create a new Apps Script (from Google Drive) with the following contents and add a Timed project trigger (most easily available from the classic editor) to run it every 15 minutes:

function archiveMuted() {
var threads = GmailApp.search('is:muted',0,100);
GmailApp.moveThreadsToArchive(threads);
}

Adjust the number 100 to the amount of muted email threads you expect in your inbox every 15 minutes.