We sent mails to customers in our application which has a link in it. In yahoo and Hotmail, whenever the customer clicks on the link it displays following warning
alt text http://img691.imageshack.us/img691/5402/warningp.jpg
The URL is long encrypted query string.
Is there any way to suppress this popup? Or How to intimate the mail server that this is not a harmful site.
Sri, that's the problem - Yahoo, Hotmail, etc. don't like IP addresses in URLs because they're non-standard and spammers who create spoof emails often use them.
See http://www.myp2pforum.eu/website-forum/10495-when-i-confirmed-my-registration-why-did-i-get-security-warning.html for someone else who had a similar problem to you.
If you're still in testing, you can add a hostname entry for that IP address on your local machine(s) (see http://en.wikipedia.org/wiki/Hosts_file), then you can essentially use a dummy hostname for testing until you get into production.
来源：https://stackoverflow.com/questions/1788558/non-standard-web-address-format