api - Services that get facebook emails -

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i've noticed android phone, iphone, outlook.com, , yahoo mail can import friends' email addresses (and phone numbers) facebook. however, don't see anywhere in documentation of api suggest can email.

do these services have special agreements facebook or not finding specific api "contact" importing? i've not had luck using "email" field friends api.

any ideas?

these services have special agreements facebook , able retrieve email ids of friends of user. of them don't allow further exporting of data obtained there directly.

and per email permissions documentation here states app developers

note: there no way apps obtain email addresses user's friends.

as per phone number, there no access no matter permission. may though ask user fill you.


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