BlackList provides the ability to instantly determine if an email contains a domain name contained in a blacklist. The blacklist can be very large, and lists of over one million domain names are handled with instant lookup times. Chilkat BlackList also un-obfuscates both HTML and plain-text email bodies and quickly parses out domain names from all parts of the email to check against a blacklist. Spammer obfuscation tricks are reversed, and domain names are returned in a canonicalized form for easy recognition. Here are some key features of "Chilkat BlackList ActiveX":    Add/remove domain names from a blacklist.    Determine if an email references a blacklisted domain.    Import/export blacklist to a text file.