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According to Wikipedia, Email privacy is the broad topic dealing with issues of unauthorized access and inspection of electronic mail. This unauthorized access can happen while an email is in transit, as well as when it is stored on email servers or on a user computer.
In countries with a constitutional guarantee of the secrecy of correspondence, whether email can be equated with letters and get legal protection from all forms of eavesdropping, comes under question because of the very nature of email. This is especially important as relatively more communication occurs via email compared to via postal mail.
Email has to go through potentially untrustworthy intermediate computers (email servers, ISPs) before reaching its destination, and there is no way to tell if it was accessed by an unauthorized entity. With that in mind, displaying an email address openly in a site, make the websites as well as webmasters highly vulnerable.
At Seoprimetools.com, we provide an Email Privacy Tool that webmasters can use to search and confirm if an email address is available on a particular website they are working on, and if that is the case, they can take the necessary measures to ensure complete security. Once they know that their website has an email id exposed, they can make the necessary modifications to remove the id and make their website safe and secure.
Reasons why you should not provide an email id on the website
Always make sure that your email id is not exposed on your site, unless it is not a big deal to you that someone may send you spam or use it for illicit purposes.