Welcome to the MDA Website!MDA is the mail and materials management services agency for the Government of Manitoba and government-funded organizations. We are dedicated to meeting your needs and solving your problems through our customer services. Contact MDA today and find out why we are becoming the preferred business source for your mail and materials solutionsNoticesMDA Mail Services Numbers Have ChangedEffective September 1, 2012, only your 6-digit Client Number will be accepted for all MDA services. When ordering new stock, please use your 6-digit Client Number now. Please do not request envelopes with the old Mail Services numbers. For questions about the new MDA Client Number, please contact Monique MacLean at (204) 945-6042.Updates more... See more text