Threading without In-Reply-To: Message-ID?
问题 So our system is sending us email notifications regarding specific incidents. The problem is, things get really spammy and disorganized, and we really want to have our email client (Gmail) thread notifications regarding the same incident. So for instance: Email 1 is sent about incident 1. Email 2 is sent about incident 1. Gmail displays them in their own threads while we want them to appear as "replies" in the same thread. I thought all I needed was to append "Re: Subject Line" but that doesn