To whom it may concern,
I'm a contractor providing support for a domain which is currently blacklisted by the Verizon anti-spam system. At the moment we do not know why, as MX Toolbox has no blacklistings for our domain name, nor how to remove the listing from Verizon's database. The procedure listed in the NDR does not appear to accomplish anything, nor have previous telephone contact attempts by my client.
I read a blog entry indicating that a post in the Verizon community forums would draw attention to the matter, so without more formal or official channel to follow, I'm hoping this will allow me to make contact with a representative who can point me in the right direction.
Please let me know what issue may have led to the listing, and what information is necessary to prove we are a properly managed mail server. I will provide specific details for contact when provided with a communication channel which is not visible to the internet.
Thanks for your time.