Anti Spam DNS help

We are needing help with some anti-spam TXT entries in our DNS, particularly with domainkeys and an SPF record (domainkeys the most important fix needed).? Most of the mail being sent from our survey site is being blocked by Yahoo because of a missing domainkeys entry. We need an expert in this area to set this up properly for us as soon as possible. Thank you. ## Deliverables Extensive knowledge generating DNS TXT records for SPF and domainkeys. The requirements for domainkeys and SPF are listed in the attached document from our survey company.