I am specifying Please visit <a href="www.yahoo.com">Yahoo</a> and the browser appends the server name in front e.g. https://susref.congnos.com/www.yahoo.com
Should I change my href to <a href="https:\\www.yahoo.com">Yahoo</a> will solve the issue?
You need to specify the scheme e.g.
Instead of
Without the scheme (the http:// bit) the browser assumes the link is relative to your site