Exchange Server Errors 451, 452 and 471 are unrelated errors and are caused due to issues on Exchange server or its database, but they result in the same problem – Mails not received through MS Outlook. In this article, we present the causes for these errors, various error messages shown and the fixes for those. though manual methods are good at resolving the errors, if the error is not fixed, then resolve through an automated solution.
Let us discuss each error, individually and find its solution.
When a sender mails an email through MS Outlook, the email client first connects to Edge Transport Server. The Edge Transport server links to the Edge Transport server at the recipient’s end through the Internet and transmits the email.
The following figure depicts the Email Relay Environment:
The error is experienced when the Email Relay environment is affected due to temporary exchange server issues like as mail limits exceeded, DNS errors, unreachable mail servers, etc., and Exchange server error can be experienced due to a discrepancy on Sender Exchange or Receiver Exchange server. The error message is flashed as:
Email delivery error due to Event ID 451 is possible due to multiple issues. Resolve the problem after a thorough examination of the error message and the email logs.
Possible Solutions to resolve Exchange Server Error 451:
Exchange server Database consists of Server data files, and these include EDB files, Log files and STM files. When the three files connect with each other, then their connection group is named as Storage Group.
Following Image depicts the MS Exchange Server Database files
Exchange server Error 452 occurs during Exchange Database Recovery. Exchange Server error 452 results in a delay of Online Database Recovery caused due to a missing Log file in the temporary folder. The following error message flashes:
Exchange Database Recovery error occurs due to missing log files. There are several reasons for missing log files: a hardware failure, damaged or corrupted the log files, and in some cases, the log files go missing:
Possible Solutions to resolve Exchange Server Error 452:
Exchange Administrators define the Storage space on the database based upon the organizational requirement due to which the Exchange server database has pre-defined space. Admins also define the Anti-spam rules by Content Filtering Policies of the organization.
Following Image depicts the MS Exchange Anti-spam filtering:
Sometimes, Exchange server encounters rollback operation issues on the database, as specified in the event description and are unable to take the future updates. In that case, there is rejection in rollback operations and the server experiences Exchange Server error 471. Until the problem is not resolved, there are no updates possible on Exchange database. Following issues lead to the rollback operations:
The error message is flashed as:
Following Error Codes are generated with Exchange Server Error 471:
An attempt to write the Log file n database fails and leads to the error. Possible Causes: Permission issues, space problems
The Disk I/O issue stops Exchange server to access the requested page in the database. Possible Cause: Disk I/O Error
Possible Solutions to resolve Exchange Server Error 471:
Find the reasons behind the permission issues and other issues to analyze these issues and address.
The most significant nightmare for Exchange Administrator is Exchange server experiencing error codes due to which the database becomes unresponsive. Though the possible solutions and the backup can rectify the error and bring the database back to normal state, it may not always be the right solution. In fact, resolving the error with the automated software like Stellar Mailbox Exchange recovery software helps to reduce the downtime and rescues Exchange Admins from unwanted disasters. The software has a grand capacity to extract single as well as multiple mailboxes to working MS Outlook including all folders and the attachments