How to get Contact names from emails?
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I have a list of email accounts. I would like to get First Name and Last Name of those email accounts. Is there any API or anyway available to do that?

For example: I have a email account named "john123@gmail.com". His contact name is "John White". But I only know the email account name "john123@gmail.com". Is there any ways to retrieve the contact name of that email account? If those contact names can be retrieved with php or APIs, that would be very pleased. Thanks in advance.