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I've built a Python app on Google App Engine which primarily handles incoming mail and does interesting based upon the email address at which the email is received.

I would like to use a custom domain for receiving emails as <some text>@<my app name>.appspotmail.com is rather cumbersome.

Unfortunately I've been unable to figure out how to get this setup. I've gleaned from questions like this one: Custom Incoming Mail Domain With Google App Engine that there is no way to enable this directly in Google App Engine but that using some sort of DNS trickery--probably related to MX records--that I'll be able to forward the emails sent to <arbitrary string>@<custom domain> to the real address at <arbitrary string>@<my app name>.appspotmail.com.

Can someone explain how to do this? I think the basic problem would be my lack of knowledge with regards to DNS, but may also be associated with the particular restrictions associated with DNS and GAE apps.

The solution presented in this question: Directing email for a domain to AppEngine email receiving service? works explicitly for domains hosted by providers with the cPanel control panel, is there a more generic solution?

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Chris W.
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It's nothing to do with "DNS trickery". You simply have to use a regular mail service - Google Apps will do - that can be configured to forward all incoming mail to a specific address, namely any address your app can receive email on. Your app can determine the original 'To' address by examining the headers.

Nick Johnson
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  • To my understanding, Google Apps is only capable of forwarding individual, pre-specified email addresses to another email address. I need to forward *all* emails sent to a *domain*. Do you know if (and how) this can be accomplished with Google Apps? – Chris W. Aug 09 '11 at 16:44
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    @Chris Set up a catchall handler in the Apps admin console to forward to that single address. It's under Settings -> Email. – Nick Johnson Aug 09 '11 at 23:53