Need DNS PTR record created for business internet (have static ip)

“tmobile for bus. is not ready for prime time” says it best.  I’m so disappointed in the “support”.  After spending the better part of the past 3 days talking to “care techs” who can’t even spell DNS or SMTP (or google it, for that matter) and then reading this.  I was finally able to get to a “supervisor” today who said she would “run it up the pole” to the engineers and she would get back to me because the engineers can’t talk directly to a customer.  The ability to send mail is the primary requirement for this service and without the PTR record, I can’t use this service and don’t have many alternatives.