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I tried to send a self generated mobi file to kindle through mailgun. I tried lots of times, below are the logs for the message status

"delivery-status": { "tls": false, "mx-host": "", "code": 499, "description": null, "session-seconds": 80.14214205741882, "retry-seconds": 600, "message": "Unable to connect to MX servers: [retail-smtp-in.amazon.com]", "certificate-verified": false },

I don't know why it shows unable to connect to MX servers. I guess it's amazon side problem cause when I send file to gmail account, it did succeed.

PS: I did set up my email address in the amazon setting.

  • I don't know what's happening in details, but after a lot of trials, it works fro 2-3 times when I pushed the items. But mostly, it works for gmail. Would anyone explain what is happening and how to make the best configuration? – user2723335 Mar 12 '16 at 06:01

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