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+ Wed, 28 Jan 2015 15:57:28 -0800 (PST)\r
+From: Jinwoo Lee <jinwoo68@gmail.com>\r
+To: Daniel Kahn Gillmor <dkg@fifthhorseman.net>,\r
+ David Bremner <david@tethera.net>,\r
+ notmuch mailing list <notmuch@notmuchmail.org>\r
+Subject: Re: privacy problem: text/html parts pull in network resources\r
+In-Reply-To: <yq65h9vbtsyt.fsf@jinwoo-macbookair.roam.corp.google.com>\r
+References: <87ppa7q25w.fsf@alice.fifthhorseman.net>\r
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+Date: Wed, 28 Jan 2015 15:57:25 -0800\r
+Message-ID: <yq65386uqx0a.fsf@jinwoo-macbookair.roam.corp.google.com>\r
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+\r
+On Tue, Jan 27, 2015 at 08:44 PM, Jinwoo Lee <jinwoo68@gmail.com> wrote:\r
+> On Tue, Jan 27, 2015 at 07:47 PM, Daniel Kahn Gillmor <dkg@fifthhorseman.net> wrote:\r
+>> On Sun 2015-01-25 12:51:43 -0500, David Bremner wrote:\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
+>> thanks for this, David and Austin!\r
+>>\r
+>> Other html-rendering mail clients that are privacy-conscious will often\r
+>> provide a button or mechanism to indicate that some remote resources\r
+>> were requested by the page but weren't fetched (e.g. a button saying\r
+>> something like [Load Remote Images...]). I have no idea who actually\r
+>> clicks on those buttons (or why), though, and even if we wanted them,\r
+>> we'd only want to add a button on an image that actually had remote\r
+>> network resources to load, and i don't know how we'd get that\r
+>> information propagated back up the rendering stack to make such a\r
+>> display decision. So i'm fine with leaving it this way for now.\r
+>\r
+> Well, most promotional emails contain remote images and their contents\r
+> are incomprehensible without those images. I ignore most of them but I\r
+> do read a few of those promotional emails. It would be great to have a\r
+> UI for loading remote resources.\r
+\r
+Do you mind if I add a boolean defcustom, which determines whether to\r
+block remote images? Its default value will be T (block), but people\r
+who want to see remote images can customize it.\r
+\r
+>\r
+>>\r
+>> --dkg\r
+>> _______________________________________________\r
+>> notmuch mailing list\r
+>> notmuch@notmuchmail.org\r
+>> http://notmuchmail.org/mailman/listinfo/notmuch\r
projects / notmuch-archives.git / commitdiff