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I've noticed that I can send email to username@facebook.com and it will get delivered to a user's Facebook inbox. Is this allowed to be done programmatically (eg send via SendGrid to re-engage users)?

Does anyone have any experience doing this? If it's allowed is there anything to watch out for or be aware of?

Brad Dwyer
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You can do this programatically, but Facebook is smart about it. If you get an email from someone Facebook doesn't know or you aren't friends with, then it will go to the Messages->Other section. If it's an email that maps to a Facebook profile that is your friend, it will show up in your inbox.

Art
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  • A good thought but that doesn't appear to be the case. I sent to a test account via an anonymous mailer page I found online and it looks like it went through ( http://www.anonymailer.net/ ) – Brad Dwyer Jun 18 '12 at 04:44
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    It's easy to catch that with domain keys; facebook might not be doing that yet. – Art Jun 18 '12 at 05:20