Arrival-Date: 2019-12-06 19-58-21
Final-Recipient: rfc822; firstname.lastname@example.org
Original-Recipient: rfc822; email@example.com
Diagnostic-Code: 550 permanent failure for one or more recipients (firstname.lastname@example.org:blocked)
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!