none-english letters in body

Hi! I send email by ‘socket.smtp’. That’s ok. But body of mail is russian text. Text field is right - russian.
But in e-mail text is пÑ?ивеÑ?Ïðèâåò îò Ñìåøàðèêîâ!. How I can re-encoding ? [import]uid: 129134 topic_id: 27529 reply_id: 327529[/import]