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+From: David Bremner <david@tethera.net>\r
+To: Edward Betts <edward@4angle.com>, notmuch@notmuchmail.org\r
+Subject: Re: exim pipe transport, notmuch insert and mbox-style messages\r
+In-Reply-To: <20141122092851.GA31815@x230>\r
+References: <20141122092851.GA31815@x230>\r
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+Date: Sat, 22 Nov 2014 10:44:45 +0100\r
+Message-ID: <87tx1r7enm.fsf@maritornes.cs.unb.ca>\r
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+\r
+Edward Betts <edward@4angle.com> writes:\r
+\r
+\r
+> I wonder if 'notmuch insert' could be modified to detect and drop the From_\r
+> line before writing the message to disk and index it. It could do that\r
+> silently or with a warning.\r
+\r
+I don't know about the larger question(s), but I'd suggest just escaping\r
+it to something like X-Envelope-From: . There may even be some\r
+semi-standard header to use for this.\r
+\r
+d\r