"Future mailings" refers to the act of sending and receiving correspondence or information through mail at a future time or on a recurring basis. Full definition
Apparently they purchased a mailing list from a credit bureau since the mailer includes an opt - out notice instructing the recipient to contact the credit bureaus to opt - out of future mailings. (getoutofdebt.org)
Seth Godin popularized the concept of offering website visitors an incentive to opt - in, or sign up to receive future mailings in his breakthrough Permission Marketing: Turning Strangers into Friends and Friends into Customers. (blog.publishedandprofitable.com)
Carman said in future mailings the administration will «make sure there is more contact information readily available on the piece itself.» (newsday.com)