Hello there,

I have an application that receives feedback from the users. We want that the
feedback received are purely genuine, at least by having a valid e-mail address
that we can reply to. Therefore, I've put up the SMTP checking method at the
e-mail address entered so that it will check the e-mail to make sure it really
does exist.

I know that this checking method is not working on Yahoo Mail addresses. What I
want to know is that, is there any other method that anyone can suggest me to
use? I've thought of using the Yahoo API for user authentication (as used in
openID or any other application) but I'm not familiar with it. It is possible to
implement that so that I could verify the e-mail address?

I also found out the profiles.yahoo.com method. Point out to the profiles page
with the right username and then extract the response page to check if the
e-mail exist or not. But I'm not sure whether this method will work for long
because the page maybe changed later and I have to re-code the extraction
process. Furthermore, if the user set his profile to private, I don't think the
checking process will be accurate anymore.

I hope that anyone can suggest me the best way to implement this.

Thank You.