I think I reached the same message that in FAQ# 4200185 [1], but I think it was receiving a mail with rare encoding in the subject (I think it is a bug in otrs) (Until I not erased this mail . Can anybody from here add this case to this faq question? Thanks [1] http://faq.otrs.org/otrs/public.pl?Action=PublicFAQ&ItemID=185