Forum Discussion
421 4.2.0 sender rejected AUP#SNDR
I manage a few mail servers for my employer. We noticed that we are being blocked by T-Mobile (relay=tmo-east.mx.a.cloudfilter.net). We send a lot of messages to our customers' SMS gateway addresses ...
Same issue here.. any status on resolution?
I have critical home automation come through as text messages such as water leaks, fires, glass breaking etc. They are not coming through for about the past week.
Please advise T-Mobile how to fix this?
