Hello,
For a while we have been using verizon vtext to send email to text in order to monitor our inventory system.
The messages stopped working a couple of weeks ago. I examined the message header and I am seeing the error message below. Could someone please help? I am not seeing my domain on any blacklists but it is apparently being blocked somewhere. thank you
SMTP Text:
(host vrz-sms.mx.a.cloudfilter.net[35.165.168.89] said: 552 5.2.0 198.154.181.16 blocked AUP#BL (in reply to end of DATA command))