Hi, From webmaster tool I found that I have one crawling error (saying the page is unreachable). The link that Google bot referring to is the webmail link. mysiteurl/webmail . which sounds stupid actually. How can I fix this so called crawling error? Is there anything to do in the robot.txt?
Have you added that link in your sitemap.xml file by any chance? Seeing as how you don't even need this indexed. Add a nofollow in the robot.txt file and resubmit the sitemap.xml file making sure this link is REMOVED from the sitemap.xml file.