I don’t see any error there.
But found server response from SMTP:
Server Response{ “code”: 403, “message”: “SimpleEmailService::sendRawEmail(): Sender – InvalidClientTokenId: The security token included in the request is invalid.\nRequest Id: 4a70b318-26c2-4093-b009-ead5cbaac49b\n”, “errors”: [ “SimpleEmailService::sendRawEmail(): Sender – InvalidClientTokenId: The security token included in the request is invalid.\nRequest Id: 4a70b318-26c2-4093-b009-ead5cbaac49b\n” ], “fallback”: “Tried to send using fallback but failed. Mockupia Support <support@staging.mockupia.com>”, “fallback_response”: { “code”: 403, “message”: “SimpleEmailService::sendRawEmail(): Sender – InvalidClientTokenId: The security token included in the request is invalid.\nRequest Id: 720b4022-bfbc-44e9-a6c7-f7fd6e948a62\n”, “errors”: [ “SimpleEmailService::sendRawEmail(): Sender – InvalidClientTokenId: The security token included in the request is invalid.\nRequest Id: 720b4022-bfbc-44e9-a6c7-f7fd6e948a62\n” ] } }