I have set up some Flexy alarms to email my 10 digit phone number with @txt.att.net at the end so that I will get the alarm notification as a text message on my phone. I do NOT receive those texts but I do get them as an email sent to my yahoo email address.
I have also tested sending an email to my 10 digit phone number with @txt.att.net from my yahoo account and that works.
Is there something special I need to do in the Flexy to get this working?