8. The method of claim 1 , further comprising determining if a sent email was delivered to domain associated with a particular user and making one or more subsequent delivery attempts if the sent email was not delivered.
8. The method of claim 1 , further comprising determining if a sent email was delivered to domain associated with a particular user and making one or more subsequent delivery attempts if the sent email was not delivered. 11. The method of claim 8 , further comprising determining if a campaign status is active before running the campaign query.