Data integrity is key to making any Direct Mail Campaign effective. Mail Source handles all of your data in a secure environment. List hygiene, CASS Certification, presort, NCOALink, can all be processed within hours of receiving data.   Postal shipping discounts, and partnerships with consolidators, gives Mail Source the ability to keep your postage costs to a minimum.   Files can be transferred electronically via our FTP site using your Internet browser.  Please see the Specs and Links page for a link to our FTP site, and to request access.   Files may also be sent by email. We prefer files to be under 10mb when sending by email.