[Gpg4win-users-de] Descrypt using signature key on OpenPGP card?

[Felix E. Klee]

On my [OpenPGP smart card][1] I have a signature key and an encryption
key, which is a sub key of the signature key.

The key that I uploaded to the [key server][2] is my signature key.
Now someone sent me a message encrypted with that key.

*Is it possible to decrypt that message using the smartcard?*

To be honest, I don't understand why I need separate encryption and
signature keys.

[1]: http://g10code.com/p-card.html
[2]: https://pgp.mit.edu/pks/lookup?op=get&search=0x839D8674BEB0FF22