Tickets :: Comment on [#11718] Imp does not always create a valid subtype

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Comment	> The following part is an excerpt of a Mail Header sent by IMP, where > the charset in the content-type is empty. > > ---- > User-Agent: Internet Messaging Program (IMP) H4 (5.0.23) > Content-Type: text/plain; charset=; format=flowed; DelSp=Yes > MIME-Version: 1.0 > Content-Disposition: inline > Content-Transfer-Encoding: quoted-printable > --- > > This happened when somebody replies to a message she could not decrypt. > > According to RFC1521 [1] a value of a subtype must be specified, so > IMP produces here imho an invalid message. > > I can reproduce it if I try to open an E-Mail I can't decrypt > (because I don't have the right OpenPGP key for it) and reply to that > e-mail. -> The e-mail sent does not specifiy a value for the charset > subtype of the Content-Type header field. > > Also various e-mail parsing tools detect such a header as invalid. > > [1] https://datatracker.ietf.org/doc/rfc1521/
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