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dkim=fail ("headers rsa verify failed") header.d=elephly.net header.s=zoho header.b=X0hwrxDt; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org"; dmarc=none; arc=reject ("signature check failed: fail, {[1] = sig:zohomail.com:reject}") X-Migadu-Scanner: scn0.migadu.com X-Migadu-Spam-Score: -1.01 X-TUID: Aa7vPuUYYIqH > See http://issues.guix.gnu.org/49114, which Mumi currently=20 > titles > > =E2=80=98guix_ lint=E2=80=99 should catch certificate validation except= ions > > There's no underscore in the original subject. The debbugs =E2=80=9C.log=E2=80=9D file for issue 49114 contains this line: Subject: bug#49114: =3D?UTF-8?Q?=3DE2=3D80=3D98guix_?=3D =3D?UTF-8?Q?lint= =3DE2=3D80=3D99?=3D should catch certificate validation exceptions This is MIME Q encoding (similar to =E2=80=9Cquoted printable=E2=80=9D enco= ding), as specified in RFC 2047. The underscore is mentioned in 4.2 (2): (2) The 8-bit hexadecimal value 20 (e.g., ISO-8859-1 SPACE) may be represented as "_" (underscore, ASCII 95.). (This character may not pass through some internetwork mail gateways, but its use will greatly enhance readability of "Q" encoded data with mail readers that do not support this encoding.) Note that the "_" always represents hexadecimal 20, even if the SPACE character occupies a different code position in the character set in use. So, the underscore above ought to be replaced with a space. This seems to be a bug in guile-email. --=20 Ricardo