My home automation system sends me SMS messages using T-Mobile's tmomail.net email to SMS gateway. I have been using it successfully for a number of months, but recently, my messages have been blocked. I have included a sample rejection notice below. Does anyone know precisely why my messages are being blocked all of a sudden and how to get around this?
Thanks so much for your help.
Your message to XXXXXXXXXX@tmomail.net has been blocked. See technical details below for more information.
The response was:
550 permanent failure for one or more recipients (XXXXXXXXXX@tmomail.net:blocked)
Final-Recipient: rfc822; XXXXXXXXXX@tmomail.net
Remote-MTA: dns; d79033b.ess.barracudanetworks.com. (18.104.22.168, the
server for the domain tmomail.net.)
Diagnostic-Code: smtp; 550 permanent failure for one or more recipients (XXXXXXXXXX@tmomail.net:blocked)
Last-Attempt-Date: Fri, 01 Sep 2017 19:15:53 -0700 (PDT)
---------- Forwarded message ----------
From: Home Automation System <XXXXX@gmail.com>
Date: Fri, 01 Sep 2017 20:11:32 -0600
Subject: <message subject>
Best answer by tmo_amanda
I'm not sure why it stopped all of the sudden, but as
- If you're a DIGITS user, we recommend installing the app on your phone. Messages are successfully being sent and received through the app.
- If there's an option for the email to be sent via HTML format, it should force the email to stay as MMSC. I know this option isn't always available especially if it's coming from a larger company such as your home automation system.
If neither of these workarounds work, the next step would be to contact Tech Support and file a ticket with them. The more tickets that are filed, the easier it is for our Engineers to determine why this is happening.