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Cloud Computing: What kind of setup with a load balancer and servers would be needed to accept a million emails from SparkPost using WebHooks?
CL
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Chad Loder, Company founder, information security investor answered:

I'm assuming that you are sending mail through SparkPost and you're accepting email transmission events via webhook from SparkPost.

The simplest way to implement and scale this would be to use Amazon's AWS API gateway connected to their AWS Lambda event-driven architecture. The architecture would look like:

SparkPost -> AWS API gateway -> AWS lambda -> external services

You can define webhook API's in the AWS API gateway very easily, with a GUI interface. The AWS lambda event driven code can be written in NodeJS (JavaScript).

This will scale to arbitrary levels of events without requiring you to invest in a lot of infrastructure.

See these examples:
https://developers.exlibrisgroup.com/blog/Hosting-a-Webhook-Listener-in-AWS

http://docs.aws.amazon.com/apigateway/latest/developerguide/getting-started.html

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