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DuplicateCheck is a script that will check any list of email addresses, find all duplicates, and write out only the unique addresses to a new file.
Make sure that your opt-in mailing list doesn't accidentally send multiple copies of your message to anyone - use DuplicateCheck to ensure your entire list is only made up of unique addresses!
This script is free to all members, Basic and Platinum. Basic membership is only $39.95!
Case insensitive (finds dupes in upper or lowercase!)
Can process ANY size list with very small RAM usage
Improves the efficency of your opt-in mailing campaigns
Run DuplicateCheck from the web or from a unix shell