I have a website that allows users to display their email address and contact number on their public profile page. These would be in link format, example:
<a href="mailto:user%40email.com" title="email user">
[email protected]</a>
<a href="tel:+123456789" title="call user">+123456789</a>
I was wondering if it is necessary at all to add a rel="nofollow" tag to these. Do search engines follow and
index these?