ARCOS has been tracking issues associated with Verizon Wireless text messages. We have confirmed that this does not include any other carriers.
ARCOS identified that Verizon does not support commercial email with @vtext.com and it should only be used for personal and limited communications. We apologize for the problems that this may be causing.
Please see the below reference links from Verizon's Community pages and a response from Verizon Customer Support.