Email to Text not working

I communicate with a group of Scout parents by sending the same email message to their email address and also to their phones via email to text. This has worked wonderfully until August 2022. All of the parents are getting their text messages except for my Verizon parents ( I am a Verizon customer and I am not getting it either. All of the other parents with different wireless providers are still receiving the messages. If I send each Verizon parent a single message, they receive the text. If I send it as a group text, Verizon customers do not receive the text. This has upset some families as they are missing events due to lack of communication. A few may get the text but days later.