cox.net mail contact?

[Andrew Prowant <andrew () prowant us>]

I hate to do this but I have been unable to get anyone at cox.net to
respond. No answer from postmaster after weeks of trying.

If there is a cox.net contact on the list, I would be extremely grateful if
you could put me in contact with a cox.net mail admin. Email to our
customers is accepted by the cox.net mail servers but our customers claim
the mail never arrives.

Thank you,
Andrew