I guess that this is achieved using a server-side communication: the Fastmail se... | Hacker News

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		vbezhenar on July 17, 2015 \| parent \| context \| favorite \| on: FastMail gains push notifications in iOS Mail.app,... I guess that this is achieved using a server-side communication: the Fastmail server send the notification to the Apple servers and the Apple server sends the notification to the user's device. So wireshark probably won't help.

kuschku on July 17, 2015 [–]

yeah, as I speculated, similar to GCM. Sadly, there isn’t an open standard for this.

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