AspEmail 5.0.0.5 replaces all CR (ASCII 13) and LF (ASCII 10) characters in properties such as Subject, CharSet, Username and others with spaces to thwart "email header injection" attacks used by spammers. In addition to this important security improvement, we also added support for Unicode characters in attachment filenames. Also, the AppendBodyFromFile method now supports text files in Unicode format. Yet another new feature is the ability to assign a custom Message-ID to a message via the AddCustomHeader method.