Email Confidentiality Clause What Are The Risks Involved When Giving Out Your Email Address?

What are the risks involved when giving out your email address? - email confidentiality clause

What are the negative effects if you send your e-mail (but not the password) to specific sites on the issue, newsletter, offered by a group, and there is no contract that says he will be kept confidential? It is the only risk is a lot of spam when the site is not really legitimate?