In the past 2 weeks I cannot send any emails or forward emails to addresses I know are valid. each time when trying to send it comes back Failure sending message. Email address not valid. It is impossible to get help from the support section for tpg. Is there a direct number that they will answer
Welcome to TPG Community,
See below link for setting up of emails for computer, android and iphone which might can help. I suggest better to set up again.