Wrong message charset

[Yura Tolstik]

I've receved a message with headers:

Content-Type: multipart/alternative;
 boundary="_000_BB1A900B2E289446979230672EE10287055C3C67dcaltoroscorp_"

--_000_BB1A900B2E289446979230672EE10287055C3C67dcaltoroscorp_
Content-Type: text/plain; charset="koi8-r"

and for languages without latin symbols subject and content looks wrong like this :
ÚÁÎÏÓÉÍ D0ÌÉÚ D3ÅÂÑ D3 D0ÏÖÅÌÁÎ=
ÉÑÍÉ C9 D4.Ð. D4Å CBÔÏ CDÎÅ CFÔÐÉÓÁÌ=
ÓÑ D5ÖÅ D7ÎÅÓÅÎÙ CEÏ CFÔ D7ÁÓ CEÕÖÎ=
Ù D5ÔÏÞÎÅÎÉÑ D0Ï CBÏÌÉÞÅÓÔ×ËÕ (=
ÞÅÌÏ×ÅË, D0ÉÔØÑ, C5ÄÙ, CBÏÌÅÓ) C9 C4=
ÁÔÅ.

so I can't read my emails :)