Hi Thanks for your reply.

When I do it manually, there are the steps, I followed.

I hit the URL in browser, as soon as it loaded, it asks me enter my credentials, after entered it is opened. I just took the view source of the page and get the email address from that. (This is manual process)

my Credentials are perfectly correct.

robots.txt, I didn't check, I don't think there is some problem with that since it is our internal sharepoint website.

Server is up and running all the time.

I don't understand, what do you mean by "non Corp-standard browser to make the request manually""... you mean to say use Opera or Chrome????.

What I think is, the way we pass the credentials is wrong or it is not accepting it properly.

or there should be some other specific way to access the sharepoint website with the credentials.

Please help me out.

Thanks

-Sunil