Remote server returned '550 5.7.501 Service unavailable. Spam abuse detected from IP range.

Question

Hi team,

I am creating an Event by using the API:

POST API: https://graph.microsoft.com/v1.0/me/events

{
    "end": {
        "dateTime": "2023-12-27T07:30:00.0000000",
        "timeZone": "
    },
    "start": {
        "dateTime": "2023-12-27T06:30:00.0000000",
        "timeZone": "
    },
    "subject": "New Meeting from Postman",
    "attendees": [
                {
                    "type": "required",
                    "emailAddress": {
                        "name": "Kedar Chandrayan",
                        "address": "<My_email>"
                    }
                },
                {
                    "type": "resource",
                    "emailAddress": {
                        "name": "Room Email",
                        "address": "
                    }
                }
            ]
}

But the event is not created properly because for the room resource I am booking, resource email rejects my mail.

With Error as show in the image:

Remote server returned '550 5.7.501 Service unavailable. Spam abuse detected from IP range. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653. S(2017052602) [PN2P287MB0444.INDP287.PROD.OUTLOOK.COM 2023-12-27T07:22:25.419Z 08DC058C717140C5]'

Could someone explain why is this happened to me and how to prevent it?

Thanks in advance.

Answer 1

Hope you are doing well,

Generally, these issues occur while using trail tenant to perform this send email activity using Graph API.

This error occurs when sending email from known, low reputation IP addresses that are typically used by new customers on Trail tenants. To fix this issue your Tenant needs to be added to a sending exclusion for 60 days to allow them to use blocked IPs whilst they still have a new/trial license.

Please raise a case with MS Support team from your tenant where you are facing issue, respective team will provide exclusion for your tenant.

Hope this helps.

Please refer following thread for more information

https://learn.microsoft.com/en-us/answers/questions/1366400/how-to-fix-remote-server-returned-550-5-7-708-serv

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