Re: privacy problem: text/html parts pull in network resources

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+From: David Bremner <david@tethera.net>\r
+To: Daniel Kahn Gillmor <dkg@fifthhorseman.net>, notmuch mailing list\r
+       <notmuch@notmuchmail.org>\r
+Subject: Re: privacy problem: text/html parts pull in network resources\r
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+References: <87ppa7q25w.fsf@alice.fifthhorseman.net>\r
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+Date: Sun, 25 Jan 2015 18:51:43 +0100\r
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+\r
+Daniel Kahn Gillmor <dkg@fifthhorseman.net> writes:\r
+\r
+> If i send a message with a text/html part (either it's only text/html,\r
+> or all parts are rendered, or it's multipart/alternative with only a\r
+> text/html subpart) and that HTML has <img\r
+> src="http://example.org/test.png"/> in it, then notmuch will make a\r
+> network request for that image.\r
+>\r
+> This is a privacy disaster, because it enables an e-mail sender to use\r
+> "web bugs" to tell when a given notmuch user has opened their e-mail.\r
+\r
+I've just pushed Austin's shr related series to master, so this problem\r
+should be fixed as of commit b74ed1c. One tradeoff that we should at\r
+least remark in NEWS, if not actually fix, is that I think there is now\r
+no way to view such images in notmuch.  I don't know offhand what other\r
+html renderers will do.\r
+\r
+d\r