Encrypted subject stays clear once encrypted

[stphn]

Still works fine for me - but I used a test workflow in K9 only.

Your usecase seems to be answered here (just for reference)

Encrypted subject is lost when replying from Thunderbird

The way Thunderbird does this by means of a nonstandard GnuPG/PGP extension. At some point in time, it made it into the mainline code of Thunderbird. K-9 does not handle encrypted mails itself. Instead, cryptography is delegated to another app (often, this is OpenKeychain). These other apps do neither know nor understand how Thunderbird encrypts the subject. If th y do subject encryption, the use other methods (which might be similar, but still different). To be more precise: Thunderbird repla…