sending text to my cell phone using @tmomail.net no longer working?

I too am experiencing issues with the email to text.  I use Home Assistant to send notifications about the house to the phone.  Stopped working beginning of July.  I see the sent item in the Gmail Sent folder, no errors. But doesn't make it to the destination.  Interestingly, when I use a different gmail account, it goes through.  But from the other gmail account it does not.  Weird. Gmail to Apple device.