MailVerify is an email validation software that validates mailing list, cleaning and eliminating invalid email addresses using email address validation tests. The validation process starts with a syntax checking, follows with domain validation, and follows with 3 different dynamic and realtime tests to validate a given account. These tests reduces drastically the number of bad email returns while increasing the accuracy of a mailing list. The validation is multithreaded, so verification is lightning fast. Invalid addresses are checked for later deletion from the mailing list.