diff --git a/PGP/Clearsigning.html b/PGP/Clearsigning.html
index 807cfd1..2bbb9ab 100644
--- a/PGP/Clearsigning.html
+++ b/PGP/Clearsigning.html
@@ -1,17 +1,13 @@
-<h2>Why do you GPG clearsign your emails instead of using PGP/MIME or something less spammy?</h2>
-
-<p>I am clearsigning my emails instead of using PGP/MIME, because I am on 
-multiple mailing lists and most of them use mailing list software, 
-which messes up with headers and this way make PGP/MIME signatures 
-unverifiable.</p>
-
-<h2>But clearsigned signature looks ugly.</h2>
-
-<p>I know that clearsigned messages may look ugly to email clients, which
-don't support PGP, but they can at least be verified on all mailing lists.</p>
-
-<h2>I am on slow connection and your signature is too big for me.</h2>
-
-<p>I am sorry for that. But keep in mind that your email client would still
-download ther PGP/MIME signature (signature.asc) file even if I used
-PGP/MIME.</p>
+<h2 id="why-do-you-gpg-clearsign-your-emails-instead-of-using-pgpmime-or-something-less-spammy">Why do you GPG clearsign your emails instead of using PGP/MIME or something less spammy?</h2>
+<p>I am clearsigning my emails instead of using PGP/MIME, because I am on multiple mailing lists and most of them use mailing list software, which messes up with headers and this way make PGP/MIME signatures unverifiable.</p>
+<h2 id="but-clearsigned-signature-looks-ugly.">But clearsigned signature looks ugly.</h2>
+<p>I know that clearsigned messages may look ugly to email clients, which don't support PGP, but they can at least be verified on all mailing lists.</p>
+<h2 id="i-am-on-slow-connection-and-your-signature-is-too-big-for-me.">I am on slow connection and your signature is too big for me.</h2>
+<p>I am sorry for that. But keep in mind that your email client would still download ther PGP/MIME signature (signature.asc) file even if I used PGP/MIME.</p>
+<h2 id="which-mailing-lists-do-that">Which mailing lists do that?</h2>
+<p>At least the following:</p>
+<ol class="incremental" style="list-style-type: decimal">
+<li><p><a href="https://lists.ubuntu.com">Ubuntu mailing lists</a>. See also <a href="https://bugs.launchpad.net/bugs/996581">bug 996581 at Launchpad</a>.</p></li>
+<li><p><a href="https://www.mozdev.org/mailman/listinfo">Mozdev mailing lists</a>.</p></li>
+<li><p><a href="http://lists.gnupg.org/mailman/listinfo/">GnuPG mailing lists</a>.</p></li>
+</ol>
diff --git a/PGP/Clearsigning.html.md b/PGP/Clearsigning.html.md
index 7d9d119..05432be 100644
--- a/PGP/Clearsigning.html.md
+++ b/PGP/Clearsigning.html.md
@@ -18,3 +18,14 @@ I am on slow connection and your signature is too big for me.
 I am sorry for that. But keep in mind that your email client would still
 download ther PGP/MIME signature (signature.asc) file even if I used
 PGP/MIME.
+
+Which mailing lists do that?
+----------------------------
+
+At least the following:
+
+1. [Ubuntu mailing lists](https://lists.ubuntu.com). See also [bug 996581 at Launchpad](https://bugs.launchpad.net/bugs/996581).
+
+2. [Mozdev mailing lists](https://www.mozdev.org/mailman/listinfo).
+
+3. [GnuPG mailing lists](http://lists.gnupg.org/mailman/listinfo/).