Does Thunderbird 91.1.0 support OpenPGP signing/encryption with < 3072 bit RSA keys? I have successfully imported my 2048 bit RSA key but Thunderbird does not recognize my email as having any valid keys. ''My 2048 bit RSA key is a pgp key.'' Furthermore, when I opt to generate a new key, the minimum bit length is 3072, so I am led to believe that < 3072 bit length is unsupported but have found no documentation to support this assertion.