Who I have the same questioned this topic

At my company, we send alerts via email to text from automated processes that have issues so that we recieve a text.  We used to send text messages from one email address to our @VTEXT.com  address and recieved them fine. We had to change the 'from' address because our company was bought by another so the domain changed.  Now those of us with verizon don't receive the texts, but those with ATT still do.  I also tried to send to @vzwpix.com and don't receive those either.  Is there  a way to see if they are being blocked from the verizon side?