Re: How to debug 'ignoring non-mail file' issues

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+From: Tomi Ollila <tomi.ollila@iki.fi>\r
+To: Perttu Luukko <perttu.luukko@iki.fi>, David Bremner <david@tethera.net>\r
+Subject: Re: How to debug 'ignoring non-mail file' issues\r
+In-Reply-To: <20140901065220.GB3901@lakka.kapsi.fi>\r
+References: <20140831074059.GA13399@rakuuna.dhcp.inet.fi>\r
+       <87tx4ssoux.fsf@maritornes.cs.unb.ca>\r
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+Date: Mon, 01 Sep 2014 10:48:30 +0300\r
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+On Mon, Sep 01 2014, Perttu Luukko <perttu.luukko@iki.fi> wrote:\r
+\r
+> On 2014-08-31 07:41:42, David Bremner wrote:\r
+>> Perttu Luukko <perttu.luukko@iki.fi> writes:\r
+>> > The vast majority of these ignored mails are not ignored after I\r
+>> > transfer them with offlineimap to another computer. I can non-ignore\r
+>> > these files probably by copying the renamed file back to the mail\r
+>> > server, so this is fixable. Offlineimap shouldn't mess with the file's\r
+>> > contents, so is there something that can cause notmuch to ignore a file\r
+>> > based on its name?\r
+>> \r
+>> The most likely cause is that the files are mboxes, whether intentional\r
+>> or not.  In particular if they start with a "From " (note the lack of :)\r
+>> and contain a second "From " at the beginning of a line later in the\r
+>> file. In this case something like sed can replace the initial \r
+>> "From " with "X-Envelope-From: ".\r
+>> \r
+>> I agree that the error message could be more informative in this case.\r
+>\r
+> No, the mails do contain "From: " with the appropriate colon. If I\r
+> understood correctly notmuch returns the same "not mail" return code\r
+\r
+The question here is whether the very first line of the mail file begins\r
+with 'From ', not whether *any* of the actual header line starts with 'From: '\r
+IIRC the mails get accepted even the 'From:' header were missing...\r
+\r
+> both when the essential headers are missing (so the file probably really\r
+> isn't mail) and when GMime fails to parse the message. I think it would\r
+> be a good idea to give a different warning in the latter case.\r
+\r
+Sure... :D\r
+\r
+>\r
+> If the files really are ignored because of GMime it also explains why so\r
+> much more files are ignored on my mail provider's server than on my\r
+> laptop. The server probably has an older version of GMime. I'll upgrade\r
+> and see if that makes a difference.\r
+>\r
+> -- \r
+> Perttu\r
+\r
+\r
+Tomi\r