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.
Yiwen seg imzizdigen-inek iseqdac aqeṛṛu udmawan igebren asekkil arameɣtu, am  ':', asekkil-agi ur yettwasiggaz ara, d asekkil ur nelli ara ascii, neɣ mačči d asekkil n ṭam n ibiten. Ma ulac aɣilif, ẓreg afaylu msgFilterRules.dat, igebren imzizdigen-inek, akke ad tekkseḍ isekkilen seg iqeṛṛa udmawanen.