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Request IP address exception for '550 5.7.708 Service unavailable"

Horst Beham 20 Reputation points
2025-12-04T18:17:01.8566667+00:00

I'm a developer and currently getting my application ready to send automated emails via Microsoft Graph. To test the implementation I needed a Microsoft 365 Business mailbox with Entra ID, so I signed up for a MS365 Business Standard trial subscription.

As mentioned in https://support.microsoft.com/en-gb/topic/ndr-error-codes-550-5-7-703-550-5-7-705-550-5-7-708-and-550-5-7-750-f5675801-1846-4d1c-9599-5b4e26a9175d trial subscriptions block outgoing emails and require an exception by MS Support.

Can you please create such an exception for me? The primary domain of the account is "beham.it"

Microsoft 365 and Office | Subscription, account, billing | For business | Windows
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  1. Q&A Assist
    2025-12-04T18:17:09.9266667+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    To request an exception for the error code '550 5.7.708 Service unavailable' due to the restrictions on trial subscriptions, you will need to contact Microsoft Support directly. Trial subscriptions often have limitations on sending emails, and exceptions can only be granted by Microsoft Support. You can reach out to them through the support options available in your Microsoft 365 admin center or via the support page for your subscription type.

    Make sure to provide them with your account details, including the primary domain "beham.it", to facilitate the process.

    References:

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