Backend Problems of My Website

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Hello,
This is Michael, junior web developer working in the small software house in the California, right now I have been assiged a new project of a client for students diploma assignment writing by my senior I have completed my project in a while but having some problem in the backend like a problem having a contact us form I have connected this form to an email address but email is not being dropped in the database or not in the eamil address. Can anyone guide me about the problem?