I can't use KMail for SMIME encrypted mails. All mails from one person (very
important to me) cannot be decrypted for some reason. I save smime.p7m from
email and try this:
gpgsm -v --debug-all --decrypt smime.p7m
and get this:
gpgsm: параметры конфигурации из файла `/home/magist3r/.gnupg/gpgsm.conf'
gpgsm: enabled debug flags: x509 mpi crypto memory cache memstat hashing assuan
gpgsm: recp 0 - error getting info: General error
gpgsm: recp 1 - error getting info: General error
gpgsm: recp 2 - error getting info: General error
gpgsm: recp 3 - error getting info: General error
gpgsm: recp 4 - error getting info: General error
gpgsm: recp 5 - error getting info: General error
gpgsm: recp 6 - error getting info: General error
gpgsm: recp 7 - error getting info: General error
gpgsm: message decryption failed: No secret key <GpgSM>
random usage: poolsize=600 mixed=0 polls=0/0 added=0/0

outmix=0 getlvl1=0/0 getlvl2=0/0

secmem usage: 0/16384 bytes in 0 blocks
Any ideas?

PS. Thunderbird decrypts these emails well.
PS2. On another machine with gpg 2.1.5 I get the same behaviour.