Wyvern DM's Wyvern Magic software was selected for its past success in handling DM accounts and providing strong data management features.
Harry Walston, sales manager at Wyvern DM, said: "TNT Post is a welcome addition to our portfolio and now sits beside major clients such as The Body Shop, the Labour Party and Cambridge University Press."
Wyvern DM says that since its management buyout from Highbury 14 months ago, it had gone from strength to strength, and intended to increase its market share with the aid of Wyvern Magic.
Mark Mason, data management consultant at TNT Post, said: "An examination of TNT Post's challenges resulted in a review to promote direct marketing industry best practice and a more tactical 'how to' piece for management of marketing data.
"Wyvern DM's experience in B2B and its ongoing support of an established product with strong data management features all contributed to the fit required."
TNT Post said it needed software designed by marketing specialists for marketing specialists, and Wyvern Magic fit the description.
Simon Dolph, head of marketing for TNT Post, said: "[Wyvern] Magic will enable us to quickly take all our disparate sources of marketing data into one repository and get up and running with a number of DM activities, while also managing the data."
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