However, none of have yet to fully meet the RFC standard.
The only way to definitively prove if an email address exists is to send it an email, something we are going to emulate soon.
In fact many of Email Hippo's affiliates, and customers started in this position and use our products as a result.
Email Hippo has been using the above process with over 6 years of experience, starting in 2009.
This is a simple workflow that most web applications follow.
One important thing to take into account is what unconfirmed users are allowed to do. Do you think those other emails should expire if a new one is sent?
Getting an access token Once you get your access token, Open Facebook gives you access to the Facebook API There are 3 ways of getting a facebook access_token and these are currently implemented by Django Facebook.
We know the tricks of the trade and wrote the book on email verification.
If you cast your eye back over the list of warnings, we have solved these and many more weird and wonderful roadblocks preventing email deliverability.
The actual SMTP commands issued are: HELO, MAIL FROM and RCPT TO.
It is the response to RCPT TO that we are interested in.