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. (188.8.131.52, 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_amandaView original