I have a database of about 3,500,000 people from back when I use to promote online gambling. The database is now several years old, and I'm assuming that 99.9% of the email addresses are no longer valid, but I think a large number of the physical mailing addresses are still current. Not all of them, but a good number of them should be good, and doing an NCOA check should get the new address if they have moved. I'm considering some direct mail marketing, and even though it is not related to gambling, I think this database could still be a good starting point for my campaign. I don't want to invest the money into doing a blind send, and would like to run NCOA on the list first. Could someone give me a referral to a reputable company that performs these services? Someone who can get me updated information in a timely manner is nice, but my biggest concern is someone who will keep my data private. I would honestly prefer to just do it myself but I don't have that kind of free time.