Email to SMS not working


    Our company's monitoring application sends email to sms.  Only t-mobile recipients are bouncing while Verizon, ATT, etc users are ok.


    Mar 11 06:39:24 ca-mon1 postfix/smtp[32376]: 44BB6C08D0: to=<>,[]:25, delay=1.3, delays=0.01/0.01/0.26/0.99, dsn=5.0.0, status=bounced (host[] said: 550 permanent failure for one or more recipients ( (in reply to end of DATA command))



    Thank You,


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