Email to SMS texing failing T-Mobile washes hands of problem

I have wasted 3 hours of my life trying to get T-Mobile to address why thier system doesn't receive some of my emails forwarded to their SMS Texting service..

I use MS Outlook Exchange Service and they use a SMTP service.

As I said, I receive some of the emails sent to SMS but others get "delayed".

T-Mobile has NO WAY FOR ME TO SEND them via email a screen shot with the engineers reply from the Exchange service - ZERO, NADA, NO WAY for me to share the actual replies - so I have to read the info to the tech over the phone!!!!

      Here is the last engineer's reply from the exchange service - they use email...

***We have checked the response from T-Mobile. As we understand you are forwarding emails from specific senders to your phone number through a custom rule you have set in Outlook. Outlook is processig the rule and sendins those forwarded messages using the MS Exchnage SMTP service. This is the same SMTP service used to send all your emails and the SMTP service is always using a secure encrypted connection. We are not sure to what gateway are T-Mobile referring as this gateway is not something provided by us. They are probably suggesting that the gateway used to convert these incoming emails to text messages is an 'unsecured consumer e-mail gateway'. We strongly advise you to check with T-Mobile and have them clarify if they need us to make any changes or if they are asking you to change your mobile phone service to either a short code or a 10 DLC long code.
 
    This is my email to the exchange engineer after the T-Mobile tech read me over the phone their reply - NO EMAIL!  I've hidden my data :-)

**  This is what T-Mobile engineers have communicated as to why my text to 1234567890@tmomail.net is receiving many delayed notices as shown below.

I have this directly from the engineers “we checked the customers T-Mobile mail logs and I'm seeing incoming messages from XYZ@ABC.com being deferred - this is an automated filter that could be triggered by a large amount of traffic over a short period of time. This traffic is currently passing over an unsecured consumer e-mail gateway and will always be at risk of being blocked. For guaranteed delivery of mission critical traffic we commend all business traffic travel over either a short code or a 10 DLC long code.

I guess this means you have to start sending my emails over a different gateway or this problem will not be resolved.

I await your reply.   HP233

I'm now shopping for a new cellular service provider as this BS that T-Mobile has put me through is totally unacceptable.  The email to SMS text service is MISSION CRITICAL to me in my business and will no longer be tolerated.

Sad they don't give an email capability to their tech people.