Experian CheetahMail will design, manage and deploy targeted email marketing campaigns for T-Mobile, as well as providing a range of professional services such as email management and strategic consulting.
T-Mobile previously ran its email marketing campaigns in-house but the deal with Experian will mean that it moves to an outsourced email marketing model.
Mark Silk, senior manager in the loyalty team at T-Mobile, said: "The mobile arena is extremely competitive when it comes to retaining existing customers. Therefore, data insight and the right expertise in how to use it is crucial to ensuring that we get the best possible return from our email marketing."
Roy Jugessur, head of sales UK and Ireland for Experian CheetahMail, said: "The deal with Experian CheetahMail will take advantage of our experience, insight and technology to help T-Mobile obtain the best possible return on its email marketing investment."
Experian CheetahMail, a division of Experian Group, is headquartered in New York with offices in Los Angeles, San Francisco, London, Dublin, Amsterdam, Paris and Barcelona.
Its global client base includes Barclays, Borders Books, Discovery Communications, KLM and Wyndham Hotels.