Having Issue with Incoming emails

[webdotapp]

Hello,

I am having an issue while receiving contact notification via mailgun smtp...

Code: Select all

 "delivery-status": {
    "tls": false,
    "mx-host": "mail.mydomain.com",
    "code": 550,
    "description": null,
    "session-seconds": 10.888506889343262,
    "message": "550 Verification failed for <[email protected]>\nUnrouteable address\nSender verify failed",
    "certificate-verified": false
  },

Please help. thanks.