Removing Ancient Snail Mail Suppressions?

Hi,

We're embarking on a project to clean up our snail mail suppressions—for example, we have thousands upon thousands of accounts that have aggressive (and global) "DO NOT MAIL" suppression attributes attached to them from as old as 2005. Since then, we've changed the name of our organization, moved venues, and have undergone countless other changes—and many of these suppressed accounts are still current ticketbuyers, who could potentially benefit from our mailings.

Has anyone had any experience in cleaning these sorts of old suppressions up? 

Best,
Krystina Tran
Stanford Live