service unavailable office 365

Microsoft doesn't support using more than one MX record for a domain that's enrolled in Exchange Online. Microsoft uses the blocked senders list to protect its customers from spam, spoofing, and phishing attacks.

The MX record for a domain that's enrolled in Exchange Online uses the syntax .mail.protection.outlook.com.
The recipient is a group, and you don't have permission to send to the group or one of its subgroups. You will know you have been added to the list when you receive a response to a mail message that includes an error that looks something like this: 550 5.7.606-649 Access denied, banned sending IP [IP address]; To request removal from this list please visit https://sender.office.com/ and follow the directions.

Have been getting the error message quoted in the subject line above for the past 2 days now.....any updates on when it might be fixed? Verify you have only one MX record configured for your domain. Some Microsoft services, including Outlook, Office 365, and Microsoft Teams, experienced a multi-hour outage on Monday, but the issues have now been resolved, according to the company. Environment Type Develop. In the EAC, go to Public folders > Public folders > select the public folder from the list, and then click Edit. Create and optimise intelligence for industrial control systems.

If any connectors already exist for … and ask them to tell their email admin about your email delivery problem. 1 year ago.

All our clients are affected by This. Find out more about the Microsoft MVP Award Program. In the Outbound connectors section, select the connector that's used for hybrid, and choose Edit. For more information, see Set up SPF to help prevent spoofing.
For information about adding your domain to Microsoft 365 or Office 365, see Add a domain to Microsoft 365. This topic describes what you can do if you see error code 5.7.1 in a non-delivery report (also known as an NDR, bounce message, delivery status notification, or DSN). This information also applies to error codes 5.7.0 through 5.7.999. The portal sends an email to the email address that you supply. To configure the public folder to accept messages from external senders, follow these steps: Open the Exchange admin center (EAC). section later in this topic. We'll be updating names in products and in the docs in the near future. Azure Active Directory. Typically, you can't fix the problem yourself.

Office 365. To do this, follow these steps: Go to Exchange Admin Center, and sign in as an Exchange Online administrator.

If your domain isn't fully enrolled in Microsoft 365 or Office 365, try the following steps: Verify your domain appears as Healthy in the Microsoft 365 admin center at Settings > Domains. To resolve the issue for the sender, approve their message, or add them to the group. To remove the restriction on the sender's source email system, forward the NDR message to delist@messaging.microsoft.com.

Open the Microsoft 365 admin center at https://portal.microsoftonline.com, and click Admin > Exchange.

But as soon as I close the VS, service stops again. To troubleshoot domain verification issues, see Microsoft Knowledge Base article KB2515404.

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