Hello, my name is ***** ***** I will do my best to assist you. Give me a few minutes to look over your question and I will respond shortly.
Is it an e-mail client that you are not able to receive e-mail from? If so, which client are you using?
You might try logging on to Gmail and the clicking on this link below. If the Less Secure Apps setting is not turned on, go ahead and switch it on and then try your e-mail client.