Fri, 10 Apr 2026 17:02:32 +0000 https://bugs.horde.org/ticket/9212 encoding of attached filenames with foreign characters is not correct When a file having foreign caracters is attached to a message and sent with IMP, the encoding does not follow exactly RFC 2231 section 4. Here is the header sent by IMP: --=_3pfswe3aoqg4 Content-Type: text/plain; charset=UTF-8; name*="utf-8''Fichier%20attach%C3%A9.txt" Content-Disposition: attachment; filename*="utf-8''Fichier%20attach%C3%A9.txt" Content-Transfer-Encoding: quoted-printable Ce fichier contient des mots avec des caract=C3=A8res accentu=C3=A9s. --=_3pfswe3aoqg4-- The name*= and filename*= should NOT be surrounded by double quotes. The lines should be instead: name*=utf-8''Fichier%20attach%C3%A9.txt and filename*=utf-8''Fichier%20attach%C3%A9.txt Some clients (rightfully) ignore these lines when the double quotes are there, but they decode the name correctly when the double quotes are removed. Wed, 01 Sep 2010 18:36:03 +0000 https://bugs.horde.org/ticket/9212#t59800 Fixed in Horde 3.3.9. This was fixed in Horde 4 long ago during the MIME rewrite. http://lists.horde.org/archives/cvs/Week-of-Mon-20100830/091233.html Wed, 01 Sep 2010 20:31:17 +0000 https://bugs.horde.org/ticket/9212#t59803 Changes have been made in CVS for this ticket: Bug: 9212 Still need quotes if data is not encoded. http://cvs.horde.org/diff.php/framework/MIME/Attic/MIME.php?rt=horder1=1.139.4.49r2=1.139.4.50ty=u Mon, 13 Sep 2010 18:38:31 +0000 https://bugs.horde.org/ticket/9212#t60038