I need Cox to Un-Block my company's email domain
I work for a small SAS software company that services mostly construction companies.
Our clients have the ability, through our software, to send individual and/or bulk emails to their clients. This is NOT spam email and are not sales related emails.
We do have a email sync program that, if a user saves their email provider, address and password in our system, allows their outgoing emails to be sent from the users actual email domain.
The problem is, if they do not have a email profile saved, and they send email out of our system - the emails come from our domain maildbx.com and are getting blocked 100% by Cox. We found this out recently as a client sent warranty specific email reminders out of the system. They verified that all of their clients received the email EXCEPT Cox customers.
We have run tests through our system and Cox is blocking 100% of our emails.
Simple, what do I need to do to have my maildbx.com domain removed from the "master blocked list" or whatever it is termed?
Please help, this is affecting our clients in a bad way and is reflecting poorly for Cox from a customer service standpoint.