HTML Mail And Telephone
Mail and Telephone can be used within HTML hyperlinks. Clicking on this hyperlink provides specific benefits of mail and telephone.
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<a href="mailto:demo123@gmail.com"> Send mail </a>
<br>
<a href="tel:+123 254 2549"> Call </a>
</body>
</html>