Email to SMS via Not Working

  • 14 September 2023
  • 2 replies


As of Sept 11 my alarm systems stopped sending me notifications via email to sms utilizing After some troubleshooting we have concluded that the email system is failing:


Could not deliver message to the following recipient(s):

Failed Recipient:

Reason: Remote host said: 452 4.1.0 server temporarily unavailable AUP#MXRT

Is anyone else experiencing this issue? Any idea how to fix it? How to escalate it? We will be missing security/fire/medical alerts!

2 replies

I have also noticed that messages inbound to my t-mobile e-mail address do not arrive as SMS messages as of the last week or so. There was a moment where it worked for a few hours 3ish days ago, but it again doesn’t work.

Userlevel 7
Badge +11

As usual, it works for me. Almost instantaneous.