At the meeting with Mandelson aide Geoffrey Norris, the DMA told of the damage that the continuing Royal Mail strikes are having on the direct marketing industry and DMA members in particular.
The meeting follows a letter sent to Lord Mandelson from Robert Keitch, the DMA's chief spokesman, setting out a case for government intervention based on the damage to businesses using direct mail.
The DMA also pressed its case in a meeting with the Rt Hon Pat MacFadden MP, the Minister of State for the Department for Business, Innovations & Skills - Royal Mail's single shareholder - at the Labour Party conference in Brighton last week.