I am sorry to hear about that problem. My name is***** am a tech expert with 17 years of experience and will help you as good as I can.
Can you please first let me know if you are receiving a bounce email when trying to send from your Cox email to Gmail (like that your email could not be delivered to Gmail "because of the following reasons")?
Please type in the box below, then click on the "Send" button to send me your reply.
Thanks for your patience and best regards,