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ListMotor is an application for e-mail list management. ListMotor offers twelve list management tasks which are: Cleaner, Merger, Remover, Filterer, Keeper, Sampler, Separator, Seeder, Counter, Splitter, Utilities, Automater. If you have thousands of email addresses in multiple lists of your hard drive, then ListMotor will help you to remove all duplicates to make sure people don't receive multiple mailings.
It will also help you to verify email syntax before mailing, removing certain email address types or even keep only certain domains, what about merging multiple lists together, and splitting lists into smaller parts.