See the subject. regarding: > it can become an even more pointed issue if subscribers suddenly see random chat appearing in their inboxes which has nothing to do with the list topic. Back in old days, we used to do that too. Changing the subject will create a new thread in almost all mail clients (when you configure them correctly. Format: * $NewSubject (was: $OldSubject) => for non-off-topic posts. * [Off-Topic] $NewSubject (was: $OldSubject) => for kinda sorta to-the-point posts. Examples: * [Off topic] What a game (Real Madrid - Barcelona!) (Was: Re: 5-1 Barcelona did some pretty cool $#!% here) * Opinions on Transpilers and Build Tools (was: I cannot understand why we need grunt at all) And we also used to delete any unnecessary text from the body (as in this email) to keep things concise. (many email clients attach the rest of the thread to the bottom of the mail body, which makes things harder to follow) I believe there’s too little flame on the wood, and splitting it to further channels will kill the fire. That’s just 2c from a fellow engineer with an MBA whose (human-readable form of) thesis subject was Social Media and Marketing ;) Cheers, Volkan.