If I have an authentication system in PHP that identifies a person with a password, I want to be able to pass that information thru to a third-party webmail using those credentials.
For instance, let's presume that my site is and I want to pre-authenticate a user and then give them a warm handoff to mail.yahoo.com (which is a bad example because they rely on client-side cookies) with that auth info.
How would my Apache/PHP/cURL server send the Yahoo form submit with the necessary params and then direct that submit's html/cookie results back to the client (and ignore the rest of their session). I'm having trouble picturing how I can accomplish this so that I'm adding value to the transaction instead of being a problem.
For instance, let's presume that my site is and I want to pre-authenticate a user and then give them a warm handoff to mail.yahoo.com (which is a bad example because they rely on client-side cookies) with that auth info.
How would my Apache/PHP/cURL server send the Yahoo form submit with the necessary params and then direct that submit's html/cookie results back to the client (and ignore the rest of their session). I'm having trouble picturing how I can accomplish this so that I'm adding value to the transaction instead of being a problem.