<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Turns out it’s possible to retroactively participate a thread that one hasn’t subscribed to. An example of it happening is here:&nbsp;<a href="https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170206/031544.html" class="">https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170206/031544.html</a><div class=""><br class=""></div><div class="">I wrote about steps to do it:&nbsp;<a href="http://dduan.net/2017/02/07/replying-to-old-mailing-list-threads/" class="">http://dduan.net/2017/02/07/replying-to-old-mailing-list-threads/</a></div><div class=""><br class=""></div><div class="">I don’t think this fact and method adds to the strength to email-as-a-tool-for-discussion. But it does address a shortcoming that bothered me a lot previously.<br class=""><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Feb 6, 2017, at 7:18 PM, Daniel Duan &lt;<a href="mailto:daniel@duan.org" class="">daniel@duan.org</a>&gt; wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">My experiment results shows that email clients does more work to group email threads than mailman. I’m going to write a blog post about how to participate retroactively to mailing list discussions. Will keep you updated :)<br class=""><br class=""><br class=""><blockquote type="cite" class="">On Feb 6, 2017, at 7:15 PM, Erica Sadun &lt;<a href="mailto:erica@ericasadun.com" class="">erica@ericasadun.com</a>&gt; wrote:<br class=""><br class="">Ah, noted.<br class=""><br class="">However both worked in my inbox<br class=""><br class="">-- E<br class=""><br class=""><blockquote type="cite" class="">On Feb 6, 2017, at 8:04 PM, Daniel Duan &lt;<a href="mailto:daniel@duan.org" class="">daniel@duan.org</a>&gt; wrote:<br class=""><br class="">I only consider this one “worked” since mailman actually associated it under the original thread on <a href="http://lists.swift.org" class="">lists.swift.org</a>. It seems the “In-Reply-To” header is all the magic required!<br class=""><br class=""><blockquote type="cite" class="">On Feb 6, 2017, at 6:47 PM, Daniel Duan &lt;<a href="mailto:daniel+test@duan.org" class="">daniel+test@duan.org</a>&gt; wrote:<br class=""><br class="">Terribly sorry for spamming. This will be the last one.<br class=""><br class="">I've added the `In-Reply-To` header to thunderbird and included the correct (hopefully!) value from a previous, on-thread message. This email address was not subscribed to the thread.<br class=""><br class=""></blockquote><br class=""></blockquote><br class=""></blockquote><br class=""></div></div></blockquote></div><br class=""></div></div></body></html>