Thunderbird S/MIME: Interoperability problem with gpgsm (KMail / Claws Mail)

Hello, Mr. Rod Whiteley from the MozillaZine Thunderbird Forums gave me the hint to bring up my questions in this newsgroup. We experienced, that Tb uses the algorithm RC2 if you send a S/MIME encrypted eMail to KMail. KMail (and Claws Mail) use gpgsm to handle the S/MIME mails. In gpgsm the

Re: Thunderbird S/MIME: Interoperability problem with gpgsm (KMail / Claws Mail)

wurstsemmel wrote: The behavior of Tb arises from its handling of the S/MIME capabilities. KMail requests an algorithm (I think AES), which Tb does not support. In this case Tb seems to fall back to RC2. please write a bug about this. https://bugzilla.mozilla.org Product would be under