If you are using SpamAssassin you can block this mail.
Just add this line in
/etc/mail/spamassassin/local.cf
and all mail from this coding wiull be marked as spam.
After that you just configure your Outlook to all mails marked spam drops in spam folder.
header LOCAL_CHARSET_BLOCKED Subject:raw =~/=?(koi8-r|windows-1251|ISO 8859-5|ISO 8859-6|ISO 8859-7|ISO 8859-8|ISO 8859-11|Windows-1253|Windows-1254|Windows-1255|Windows-1256|Windows-1258)?/i
score LOCAL_CHARSET_BLOCKED 5
describe LOCAL_CHARSET_BLOCKED Contains charsets that are not acceptable