Sendgrid being blocked

magenta10446303

    X-SendGrid-QueueID: 561860164

    X-SendGrid-Sender: <bounces+2699140-3366-xxxxxxxxxx=tmomail.net@sendgrid.net>

    Arrival-Date: 2019-12-06 19-58-21

     

    Final-Recipient: rfc822; xxxxxxxxxx@tmomail.net

    Original-Recipient: rfc822; xxxxxxxxxx@tmomail.net

    Action: failed

    Status:

    Diagnostic-Code: 550 permanent failure for one or more recipients (xxxxxxxxxx@tmomail.net:blocked)

     

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    I've replaced the phone number with x's

     

    Our company uses Sendgrid to send information to clients, recently they've been getting this bounce-back when emailing to text.

     

    What do I need to do to get these cleared through?

     

    I'm aware of these rules:

    Per Cellular Telecommunications and Internet Association (CTIA) Industry guidelines, Intercarrier guidelines and T-Mobile's own Terms and Conditions of Service, automated commercial SMS traffic routing on any network should use short codes.

     

    Repetitive mass texts over 10-digit texting are forbidden by CTIA carriers, including T-Mobile. Continued SMS abuse can result in subscriber number being permanently blocked not only by T-Mobile, but also by other carriers, which is outside of T-Mobile control.

     

    Commercial trafficking is only allowed through short code, and not through long code (10-digit numbers) and a customer must opt in to receive content.

     

    Third-party services can send bulk messages, but such vendors are unaffiliated with T-Mobile.

     

     

    But that last line suggests that Sendgrid should be able to transmit these messages properly.

     

    We need to be able to send these messages, what can I do? Thanks in advance!

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