Fix NDR Error "550 5.7.1" In Exchange Online > 제품소개

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It's irritating whenever you get an error after sending an e-mail message. This matter describes what you can do in case you see error code 5.7.1 in a non-delivery report (also referred to as an NDR, bounce message, supply standing notification, or DSN). This information also applies to error codes 5.7.0 by way of 5.7.999.

This information additionally applies to error codes 5.7.Zero through 5.7.999 in Exchange Online and Microsoft 365 or Office 365. There may be a number of causes for dsn error code 5.7.1, for which options are supplied later on this subject.

Why did I get this bounce message?

Typically, this error indicates a security setting in your group or the recipient's group is preventing your message from reaching the recipient. For example:

- You do not have permission to ship to the recipient.- The recipient is a group, and you do not have permission to ship to the group or one in all its subgroups.- You do not have permission to send e mail by means of an e-mail server that's between you and the recipient.- Your message was routed to the flawed e-mail server.

I bought this bounce message. How do I repair this challenge?

Typically, you can't fix the issue your self. You'll need the recipient or the recipient's e mail admin to fix the configuration on their end. However, listed here are some steps which you could strive:

If the recipient is exterior (exterior of your organization): Contact the recipient (by phone, in particular person, and so forth.) and ask them to tell their e-mail admin about your email supply downside. Their electronic mail admin may have to reconfigure the recipient's mailbox so it accepts e mail from you.

If the recipient is an inner group: You may not have permission to ship to the group or to one in every of its subgroups. On this case, the NDR will embrace the names of the restricted teams that you don't have permission to ship to. Ask the proprietor of the restricted group to grant you permission to send messages to the group. If you don't know the group's proprietor, you can find it in Outlook or Outlook on the web (previously often called Outlook Web App) by doing the following steps:

Outlook: Select the NDR, double-click the group name on the To line, after which choose Contact.Outlook on the net: Select the NDR, select the group identify on the To line, after which select Owner.

If you're sending to a big distribution group: Groups with more than 5,000 members have the following restrictions routinely utilized to them:

- Messages sent to the group require approval by a moderator.- Large messages cannot be sent to the group. However, senders of giant messages will obtain a distinct NDR. For more information about giant messages, see Distribution group limits.

To resolve the issue, join the group, or ask the group's owner or moderator to approve your message. Refer them to the I'm the owner of a restricted group. What can I do? part later in this matter.

If none of the previous steps apply or remedy your issue, contact the recipient's e-mail administrator, and refer them to the I'm an e-mail admin. How can I fix this challenge? part later in this matter.

I'm the proprietor of a restricted group. What can I do?

If a message sender obtained this NDR once they attempted to send a message to your group, and also you want them to successfully ship messages to your group, attempt one of the next steps:

Remove the sender restriction: Change your group settings to unblock the sender in considered one of the following ways:

- Add the sender to the group's allowed senders record. Note that you have to create a mail contact or a mail user to represent the exterior sender in your organization.- If the sender is restricted because they're external (outdoors your group), configure the group to accept messages from external senders.- If you've got configured a mail move rule (also known as a transport rule) to limit sure senders or groups of senders, you can modify the rule to just accept messages from the sender.

Restrictions on massive groups: Groups with greater than 5,000 members have the following restrictions routinely utilized:

- Messages sent to the group require approval by a moderator.- Large messages cannot be despatched to the group (however you will receive a different NDR from this one if that's the issue). See Exchange Online Limits.

To resolve the issue for the sender, approve their message, or add them to the group.

Managing distribution groups

Configure moderated recipients in Exchange OnlineCreate and handle distribution groups in Exchange Online

I'm an e-mail admin. How can I fix this situation?

The sender is external (outdoors your group)

If only this recipient is having difficulty accepting messages from exterior senders, configure the recipient or your electronic mail servers to accept messages from external or anonymous senders.

The recipient is a public folder in your Exchange Online organization

When the recipient is a mail-enabled public folder in your Exchange Online organization, an exterior sender will obtain an NDR with the following error code:

Remote Server returned ' #5.7.1 smtp;550 5.7.1 RESOLVER.RST.AuthRequired; authentication required [Stage: CreateMessage]'

To configure the general public folder to simply accept messages from external senders, observe these steps:

New EAC

Go to Public folders > Public folders.

Choose a public folder from the listing, after which click Edit .

Click Mail stream settings.

Under Message Delivery Restrictions > Accept messages from, perform the next duties:

Classic EAC

Open the Exchange admin middle (EAC). For more information, see alternate admin center in change on-line.

Within the EAC, go to Public folders > Public folders > choose the general public folder from the listing, and then click Edit .

In the general public folder properties dialog box that opens, go to Mail circulation settings, and configure the following settings in the Accept messages from part:

- Clear the check box for Require that all senders are authenticated.- Select All senders.

Click Save.

The sender is exterior and their supply IP deal with is on Microsoft's blocklist

On this case, the NDR the sender receives would include info in the Diagnostics for administrators section just like the following info:

5.7.1 Service unavailable; Client host [xxx.xxx.xxx.xxx] blocked utilizing Blocklist 1; To request elimination from this checklist please ahead this message to delist@microsoft.com

To remove the restriction on the sender's supply email system, ahead the NDR message to delist@microsoft.com. Also see Use the delist portal to remove yourself from the blocked senders list.

Your area is not absolutely enrolled in Microsoft 365 or Office 365

If your area is not absolutely enrolled in Microsoft 365 or Office 365, strive the next steps:

- Verify your area appears as Healthy within the Microsoft 365 admin center at Settings > Domains.- For details about adding your domain to Microsoft 365 or Office 365, see Add a domain to Microsoft 365.- To troubleshoot area verification points, see Troubleshoot domain verification points in Office 365.

Your domain's MX file has a problem

If you have an incorrect MX file, attempt the following steps:

Check the sender and recipient domains for incorrect or stale MX data by utilizing the Advanced diagnostics > Exchange Online test in the Microsoft Support and Recovery Assistant. For extra data about the Support and Recovery Assistant, see Concerning the Microsoft Support and Recovery Assistant.

Check along with your domain registrar or DNS internet hosting service to verify the MX file in your area is correct. The MX file for a domain that is enrolled in Exchange Online uses the syntax _\_.mail.protection.outlook.com.

Verify Inbound SMTP Email and Outbound SMTP Email at Office 365 > Mail Flow Configuration within the Microsoft Remote Connectivity Analyzer.

Verify you might have only one MX report configured on your area. Microsoft would not help using multiple MX document for a domain that is enrolled in Exchange Online.

Your domain's SPF document has a problem

The Sender Policy Framework (SPF) file to your domain could be incomplete, and might not include all e-mail sources to your domain. For more data, see Arrange SPF to help forestall spoofing.

Hybrid configuration issues

In case your area is part of a hybrid deployment between on-premises Exchange and Exchange Online, the Hybrid Configuration Wizard ought to mechanically configure the required connectors for mail movement. Even so, you need to use the steps on this part to verify the connector settings.

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

In the Exchange admin middle, click on Mail Flow > Connectors. Select the connector that's used for hybrid, and select Edit. Verify the next data:

Delivery: If Route mail by good hosts is chosen, affirm the proper IP tackle or FQDN is specified. If MX file associated with the recipient domain is chosen, affirm the MX document for the domain factors to the right mail server.

You may take a look at your MX file and your ability to send mail from your Exchange Online organization through the use of the Outbound SMTP Email take a look at in the Microsoft Remote Connectivity Analyzer.

Scope: If it's essential to route inbound web mail to your on-premises Exchange organization, Domains want to incorporate all electronic mail domains which are utilized in your on-premises organization. You need to use the value asterisk (*) to also route all outbound internet mail by the on-premises group.

If the connectors are configured incorrectly, your Exchange administrator must rerun the Hybrid Configuration Wizard in the on-premises Exchange organization.

In case you disable an on-premises Active Directory account, you'll get the next error message:

Your message could not be delivered to the recipient because you do not have permission to ship to it. Ask the recipient's e mail admin so as to add you to the accept listing for the recipient. For more information, see DSN 5.7.129 Errors in Exchange Online and Microsoft 365 or Office 365.

To stop all communication with the Exchange Online mailbox, you might want to delete the on-premises person account as an alternative of disabling it.

Another resolution would be to remove the license, but then you'll need to create a mail circulation rule (also called a transport rule) to forestall the user from receiving e-mail messages. Otherwise, the consumer would proceed to receive messages for about 30 days after elimination of the license.

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