[exim] Eximfilterfile with UTF-8 support for subjects ?

Hi guys,

just a quick reinsurance, exim can filter by subjects or emails, if the
subject is encoded in utf-8 ?Q? format, correct ?

Subjects like this: =?ISO-8859-1?Q?Crypto_plugin_f=FCr_dovecot?= or
even better in base64 encoded utf8


best regards,
Marius