One of your filters uses a custom header that contains an invalid character, such as ':', a non-printable character, a non-ascii character, or an eight-bit ascii character. Please edit the msgFilterRules.dat file, which contains your filters, to remove invalid characters from your custom headers.
Un de tu filtros usa un titulo personalisate que contine un character non valide, tal como ':', non-imprimibile, non-ascii o ascii a octo-bit. Redige le file msgFilterRules.dat, que contine tu filtros, pro eliminar le characteres invalide ex tu titulos personalisate.