The campaign, which is sponsored by The Read Group, SmartFocus and the NSF Consortium, is looking to plant trees in native woodland in partnership with the Woodland Trust.
So far 51 trees have been planted and the DMA is hoping that more member companies will take part in a series of environmental actions to help fulfil Government commitments.
The DMA is asking companies to practice environmentally friendly policies such as reclaiming inks and varnishes and using recycled paper.
The campaign is targeting the entire industry, including all those involved in direct mail, promotions, agencies, clients, list brokers, mailing houses and postal operators.
Trees will be planted when companies register the kind of action they are taking on the campaign . The more action they take, the more trees are planted, with progress shown visually by a 'treeometer' tree on the homepage turning green.
The DMA aims to meet its tree-planting target by spring next year.
Stage two of the campaign will launch in the autumn, and focus on raising awareness of the recycling message among local authorities across England and Wales.
David Robottom, DMA director of postal affairs and industry development, said: "To protect the environment and safeguard the future of our industry it is vital that we work together to improve our environmental record and overcome the negative perceptions that exist among consumers about direct marketing."
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .