Office 365 offers you countless benefits by exchanging emails between the sender account and the partner. However, some users report having trouble with the “exchange 550 5 7 1 resolver RST authrequired authentication required” error without knowing where the problem lies.
If you are also stuck in this case, then the Trustguide article is what you are looking for! Here, we provide the most useful information about this error code and a specific troubleshooting guide for newcomers!
Why My Computer Has The Exchange 550 5.7.1 Resolver RSTauthrequired authentication Required Error?
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While working with Office 365, you sometimes won’t be able to send emails to mail-enabled public folders or groups of distribution accounts. Specifically, the receiving account does not receive the email, while the sending account receives a “nondelivery” (NDR) notification.
The error code in the Exchange Server log entry looks like this:
- Action: failed
- Status: 5.7.1
- Diagnostic-Code: SMTP; 550 5.7.1 RESOLVER.RST.AuthRequired; authentication required
So, what is the cause of this error?
As per Office 365 policy, any email you send to the distribution group must go through an authentication process. Specifically, it only allows you to send emails to addresses inside the specified domain. This function will help localize groups of email recipients and protect public folders from cyber attacks.
Sending emails to accounts outside the authentication domain will be prevented, resulting in the error code “550 5.7.1 RESOLVER.RST.AuthRequired”. However, distribution groups allow multiple users of different domains to share the same email. Therefore, you can take advantage of this utility – send a message to the general email, which will help you send the information to the members using that account.
How To Exchange 550 5.7.1 Resolver RST Authrequired Authentication Required?
Exchange 2010/2007 users can completely disable the authentication process in sending emails through our guide below:
- Step 1: Access the “Exchange Management” tab, then search for the “Recipient Configuration” item and select “Distribution Groups”. Find the name of the group that is having problems and open its “Properties” section.
- Step 2: Search for “mail flow settings” tab, and select the “Message sending limit” and “Properties” items. Then remove “Require all senders to be authenticated”, then select “OK”.
- Step 3: Close the tabs and send some test emails.
In addition, users can refer to the method of disabling email authentication through the command of the EM Shell below:
set-DistributionGroup -identity YourDistributionList -RequireSenderAuthenticationEnabled: $false
Or you can enter this command instead:
set-DynamicDistributionGroup -identity YourDistributionList -RequireSenderAuthenticationEnabled: $false
If you want to receive mail through the relay without hassle, configuring a dedicated connector with server authorization (Exim/postfix) in your computer’s domain would be the most suitable method.
To prevent similar errors from arising when receiving mail in public folders, you will need to change permissions via the following PowerShell command:
Add-PublicFolderClientPermission -identity “\yourpublicfolder1” -User Anonymous -AccessRights CreateItems
Add-PublicFolderClientPermission -identity “\yourpublicfolder1” -User Default -AccessRights CreateItems
For public folders, you can enter the following command to remove domain restrictions:
Get-PublicFolderClientPermission -identity “\yourpublicfolder1”
Finally, double-check the information changed in Exchange by accessing “Toolbox” and “monitoring messages” to ensure you were successful.
FAQs
What Does The “550 5.7.13 STOREDRV.AuthenticationRequiredForPublicFolder” Error Show?
When you send an email to a public folder, you will sometimes receive a “Nondelivery” (NDR) message with the following code description:
“550 5.7.13 STOREDRV.AuthenticationRequiredForPublicFolder”
This code indicates that the system is blocking your message because the recipient account is outside the domain specified in the system settings.
What Is The Cause Of The “550 5.7.13 STOREDRV.AuthenticationRequiredForPublicFolder” Error?
You can refer to the two main causes of email blocking errors that we have compiled below:
- The public folder receives messages from internal users: Sender and recipient use the same “Default User Permissions”.
- Public folders receive messages from external users: Senders and recipients don’t have Anonymous and Default enabled, so messages cannot reach the public archive.
What Should I Do To Troubleshoot The “550 5.7.13 STOREDRV.AuthenticationRequiredForPublicFolder” Error?
If you have admin rights, you can enable Anonymous or Default user permissions (depending on the case) by following our detailed instructions below:
- Step 1: Access the “Exchange Online Powershell”
- Step 2: Depending on the case, enter the appropriate Add-Public Folder Client Permission cmdlet via Powershell:
For “Default User” permission:
Add-PublicFolderClientPermission -Identity “\ <name_of_public_folder>” -User default -AccessRights CreateItems
For the “Anonymous User” permission:
Add-PublicFolderClientPermission -Identity “\<name_of_public_folder>” -Anonymous User -AccessRights CreateItems
Note: You need to enter the name of your computer’s mail-enabled folder in the phrase “<name_of_public_folder>”.
Final Verdict
Our article is pleased to serve you the most useful information to deal with the “exchange 550 5 7 1 resolver RST authrequired authentication required” error. Wishing you success in fixing the problem and having the best working experience with Office 365!
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