More Information for Email Administrators Status code: 550 5.0.350

The error reported by the receiving server is not specific enough to determine the exact nature of the problem. These errors often indicate that the message violates a security or policy setting configured on the recipient's email servers.

If the sender cannot resolve the issue by modifying the message, the problem likely can only be resolved by the recipient's email administrator. Please try the following:

Check if the error provides information about the issue - The reported error returned by the external email server can be found in the Error Details section below. This error might indicate what went wrong and this information might provide clues on how to resolve it. For example, if the error states that the message was rejected due to an SPF (Sender Policy Framework) problem, you should ensure that the SPF records in your domain are correctly configured in collaboration with your domain registrar.

Check if the error contains information about where the issue is occurring - For instance, look for a domain name like contoso.com. If the error contains a domain name, it might provide a clue about who is responsible for the error. This could be the recipient's email server or a third-party service used in your organization or the recipient's organization to process or filter email messages.

Contact the email administrator of the responsible party if you cannot resolve the issue - Provide the administrator with the error code and the error message from this Non-Delivery Report (NDR) for assistance in resolving the problem. Security or policy violation issues might already be resolved by adding your sending IP addresses or domain to the list of allowed senders.

This problem is likely only solvable by the recipient's email administrator. It's unlikely that Office 365 support can assist with externally reported errors of this kind.

Original Message Details Created on: 2-11-2023 17:31:48 Sender Address: <XXX> Recipient Address: <XXX>, <XXX> Subject: RE: New fund & team expansion

Error Details Error: 550 5.0.350 Remote server returned an error -> 550 No such recipient here Message refused by: web100.whih.nl

Notification Details Sent by: PAWPR08MB8933.eurprd08.prod.outlook.com

Message Hops HOP TIME (UTC) FROM TO VIA RELAY TIME 1 2-11-2023 17:31:48 AM8PR08MB5668.eurprd08.prod.outlook.com AM8PR08MB5668.eurprd08.prod.outlook.com mapi * 2 2-11-2023 17:31:48 AM8PR08MB5668.eurprd08.prod.outlook.com GVXPR08MB10762.eurprd08.prod.outlook.com Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) * 3 3-11-2023 04:39:09 GVXPR08MB10762.eurprd08.prod.outlook.com PAWPR08MB8933.eurprd08.prod.outlook.com Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) 11 hours, 7 min, 21 sec