How to detect if an email is a Google Account?

api openid single-sign-on google-account
FernandoEscher picture FernandoEscher · Nov 24, 2010 · Viewed 12.8k times · Source

Me and some guys here are working on an start up. We are currently using Google OpenID API to manage registration and login to our app, but we want to migrate to a easier user registration model. And for this, we need to know if there is a way we can detect if an email (not gmail) is already a Google Account. Is there a way to get this info from the Google Single Sign-on API?

Previous thanks for your help! :)

Answer

dbadness picture dbadness · Dec 30, 2015

If you're on a Mac, open Terminal and enter $ host {example.com} to determine if their email is hosted by Google.

For example:

$ host yelp.com
yelp.com has address 104.16.57.23
yelp.com has address 104.16.56.23
yelp.com mail is handled by 1 ASPMX.L.GOOGLE.com.
yelp.com mail is handled by 10 ASPMX2.GOOGLEMAIL.com.
yelp.com mail is handled by 10 ASPMX5.GOOGLEMAIL.com.
yelp.com mail is handled by 10 ASPMX3.GOOGLEMAIL.com.
yelp.com mail is handled by 5 ALT2.ASPMX.L.GOOGLE.com.
yelp.com mail is handled by 10 ASPMX4.GOOGLEMAIL.com.
yelp.com mail is handled by 5 ALT1.ASPMX.L.GOOGLE.com.

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