I would strongly advise using an e-mail marketing software - one which we have affiliations to also does a pre-liminary "spam" check too prior to sending! Do you use any "sending" software at present?
There are a number of "services" out there (If you Google the term - domain acquisition service) that'll try and "obtain" a domain which has been registered to someone on your behalf, and might I add, some do charge a hefty fee too!
An alternative (if the domain is parked), would be for you...