Can enabling curcular loging lose mail

Enabling circular logging in Exchange Server can potentially cause issues with email delivery, including losing mail. Here's why:

Circular logging is a feature that allows Exchange to reuse log files instead of creating new ones. This can help reduce storage requirements and improve performance. However, when circular logging is enabled, Exchange may not always be able to write all log entries to disk before reusing the log file. This can lead to log entries being lost or corrupted.

If an email is being processed when the log file is reused, the log entry for that email may not be written to disk. As a result, the email may not be properly logged, and it may not be possible to recover it if something goes wrong during delivery.

Additionally, if the log file is reused before all log entries have been written to disk, it can cause issues with email delivery. For example:

  1. Email may be lost: If an email is being processed when the log file is reused, the log entry for that email may not be written to disk. This means that the email may not be properly logged, and it may not be possible to recover it if something goes wrong during delivery.
  2. Email may be duplicated: If an email is being processed when the log file is reused, the log entry for that email may be written to a new log file. This can cause the email to be duplicated, which can lead to issues with email delivery and storage.
  3. Email may be delayed: If an email is being processed when the log file is reused, it may be delayed or lost. This can cause issues with email delivery and may lead to frustrated users.

To minimize the risk of losing mail when enabling circular logging, you can take the following steps:

  1. Set a reasonable log file size: Set the log file size to a reasonable value to ensure that log entries are not lost due to log file reuse.
  2. Monitor log file usage: Monitor log file usage to ensure that log files are not being reused too frequently.
  3. Use a reliable storage system: Use a reliable storage system to ensure that log files are not lost or corrupted.
  4. Test email delivery: Test email delivery to ensure that emails are being delivered correctly and not being lost or duplicated.

In summary, enabling circular logging in Exchange Server can potentially cause issues with email delivery, including losing mail. To minimize the risk of losing mail, you should set a reasonable log file size, monitor log file usage, use a reliable storage system, and test email delivery.