Email to text message not working

agb

    I'm trying to use Microsoft Outlook to send an email that is received as a text message. Here's the error message this I receive:

     

    The following message to <XXXXXXXXXX@tmomail.net> was undeliverable.

    The reason for the problem:

    5.3.0 - Other mail system problem 550-'permanent failure for one or more recipients (XXXXXXXXXX@tmomail.net:blocked)'

     

    This works fine sending to ATT or Verizon phones but not T-Mobile. I've tried with both my main number and a Digits line with the same error message.

     

    Any ideas?

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