I can not receive emails from one customer email address

There are a few steps you can take. First, check your email spam or junk folder to see if the emails from the customer are being mistakenly filtered as spam. Sometimes, emails from certain senders can end up in these folders accidentally.

Next, verify with the customer that they are sending the emails to the correct email address. It's possible that there may be a typo or mistake in the email address they're using to send you emails, which could be causing the emails to not reach your inbox.

If you're still not receiving emails from the customer after checking your spam folder and verifying the email address, it's possible that there may be an issue with your email provider or email server. In that case, you may need to contact your email provider's support team for further assistance. They can help you investigate any potential issues with your email account or server that may be preventing you from receiving emails from the customer.