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If Alice and Bob are on a Team, "Alice and Bobs Team", then Alice can send an email to "aliceandbobsteam@synapse.org". The message will be sent to each team member as if it were sent to them directly.
TODO: Shall we limit Team messaging in any way? E.g. can only Team admin's send messages to Teams? Shall we only allow messaging to small Teams? (We could even combine the two and allow all small Team members to email each other, but for large Teams only allow admin's to do so.)We will allow Team administrators to control who has permission to send messages to the Team.
Each message will have a "one-click unsubscribe" footer, facilitating update of the recipient's notification settings to suppress email delivery.
Leveraging the Synapse
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Messaging System
Synapse has an existing system for sending messages, described here: Messaging services. This service requires the client to upload the body of an email to an S3 file, then create a message object referencing the file and containing other metadata (from, to, subject). We will leverage this by adding a component which receives emails and converts them to web requests. The service we have investigated for this purpose is http://www.cloudmailin.com/. CloudMailIn has an option to format requests as JSON, http://docs.cloudmailin.com/http_post_formats/json/
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