List of Microsoft SMTP Service Events

SMTP events for Microsoft SMTP Service are listed here in the format Event ID: Type (for example, 100: Informational), followed by the description of the event and information on recommended user actions.

401: Error
Description   Microsoft SMTP Service cannot initialize the socket library (Wsock.dll). Network settings might not be correct, or another service might be connected to the port youÆve configured for TCP/IP.
User Action Restart the computer.
Check the TCP/IP configuration in the Network application in Control Panel. If TCP/IP is installed, be sure that it is bound to the correct adapter(s). (For more information, see the Windows NT Server documentation.)
Stop any other services listening on the port you have configured for TCP/IP, or change the port in the SMTP Site property sheet in Internet Service Manager.

402: Error
Description   On SMTP site %1, the maximum number of allowed inbound connections (%2) has been reached. All additional connections are being closed.
User Action Raise the maximum number of inbound connections in the SMTP Site property sheet in Internet Service Manager. If necessary, add additional SMTP server computers to handle the volume of connections.

403: Error
Description   Microsoft SMTP Service cannot initialize %1 because there is not enough memory available for mail queue objects.
User Action Free up the memory currently in use by closing any nonessential applications. You might also want to increase your systemÆs physical or virtual memory.
Lower the maximum number of mail queue objects (For more information, see the MaxMailObjects registry value in Registry Entries for Microsoft SMTP Service).

407: Error
Description   SMTP site %1 cannot create a client connection object for a user at host %2. The connection to this user is forced closed because there arenÆt enough connection objects defined in memory.
The return error code (in the Data box shown below) might be useful if you have to call Microsoft Technical Support to fix this problem.
User Action Increase the maximum number of connection objects.
If necessary, add additional SMTP server computers to handle the volume of connections.

415: Informational
Description   Microsoft SMTP Service has been started.
User Action No action is required.

416: Informational
Description   Microsoft SMTP Service has been stopped.
User Action No action is required.

417: Error
Description   SMTP site %1 cannot open the SMTP metabase key (path %2) because either the metabase isnÆt available or the key doesnÆt exist.
User Action Check to see that the metabase is available and that the key exists. If the key exists, the metabase is corrupt and you have to rerun Setup. (For more information, see the IIS documentation.) If the key does not exist, restart the computer and check the disk for corruption.

418: Error
Description   SMTP site %1 cannot read the value at the SMTP metabase key %2 because the metabase might be corrupted.
User Action Check to see that the metabase key exists. If it does, you have to rerun Setup. (For more information, see the IIS documentation.)
If the key does not exist, restart the computer and check the disk for corruption.

419: Error
Description   Microsoft SMTP Service cannot create mail queue file %1 because the computer is out of disk space.
User Action Check for available disk space on the hard drive that holds the mail queue. You might want to increase your systemÆs physical or virtual memory.

420: Error
Description   Microsoft SMTP Service cannot write to mail queue file %1 because the computer is out of disk space.
User Action Check for available disk space on the hard drive that holds the mail queue. You might want to increase your systemÆs physical or virtual memory.

422: Error
Description   Microsoft SMTP Service could not create a stream file for SMTP site %1. The most common reason is that the computer is out of disk space.
The stream file, also called the envelope, stores address information that is used by SMTP.
The return error code (%2) might be useful if you have to call Microsoft Technical Support to fix this problem.
User Action You might want to increase your systemÆs physical or virtual memory. Also, check for disk corruption. If necessary, call Microsoft Technical Support.

427: Warning
Description   For SMTP site %1, the smart host name in the Delivery property sheet in Internet Service Manager is not valid in the metabase. The metabase might be corrupt. Smart host delivery is not available for this session.
User Action Restart the computer, and check the disk for corruption. You might have to rerun Setup. (For more information, see the IIS documentation.)

428: Warning
Description   The specified Badmail directory for SMTP site %1 is not valid. Undeliverable messages cannot be saved for this session; instead, they will remain in the Queue directory and their file extensions will be changed to .bad. Possible causes include the following: a filename instead of a path might be specified for the Badmail directory; the path might be wrong; the disk might be full; or the disk might be corrupt.
User Action Make sure the Badmail directory path in the SMTP Messages property sheet in Internet Service Manager is correct. You might have to fix network permissions, check the disk for corruption, or increase your system's physical or virtual memory.

429: Error
Description   The specified mail queue directory for SMTP site %1 is not valid. Microsoft SMTP Service cannot be started.
User Action Rerun Setup. (For more information, see the IIS documentation.)

478: Warning
Description   SMTP site %1 cannot write metabase key %2. The metabase might be corrupt, or network permissions might be missing or incorrect.
The return error code (in the Data box shown below) might be useful if you have to call Microsoft Technical Support to fix this problem.
User Action Rerun Setup. (For more information, see the IIS documentation.) If necessary, call Microsoft Technical Support.

479: Informational
Description   Reverse DNS Lookup is enabled on SMTP site %1.
User Action No action is required. This value is set in the Delivery property sheet in Internet Service Manager.

480: Informational
Description   Reverse DNS Lookup is disabled on SMTP site %1.
User Action No action is required. This value is set in the Delivery property sheet in Internet Service Manager.

481: Informational
Description   For SMTP site %1, the maximum number of hops that are allowed before a message is labeled NDR is set to %2.
User Action No action is required. This value is set in the Delivery property sheet in Internet Service Manager.

482: Informational
Description   For SMTP site %1, the maximum number of SMTP protocol errors that are allowed is set to %2. If more errors occur, the connection is closed. This value is specified in the MaxSmtpErrors metabase property.
User Action No action is required.

483: Informational
Description   For SMTP site %1, the advertised maximum message size is set to %2. However, messages larger than this limit still will be accepted.
User Action No action is required. This value is set in the Messages property sheet in Internet Service Manager.

484: Informational
Description   For SMTP site %1, the maximum message size that is accepted before the socket is forced closed is set to %2.
User Action No action is required. This value is set in the Messages property sheet in Internet Service Manager.

485: Informational
Description   For SMTP site %1, the amount of time remote connections are allowed to exist before being forced closed is set to %2.
User Action No action is required. This value is set in the SMTP Site property sheet in Internet Service Manager.

486: Informational
Description   For SMTP site %1, the maximum number of outbound connections is set to %2.
User Action No action is required. This value is set in the SMTP Site property sheet in Internet Service Manager.

487: Informational
Description   For SMTP site %1, the maximum number of recipients per message is set to %2.
User Action No action is required. This value is set in the Messages property sheet in Internet Service Manager.

488: Informational
Description   For SMTP site %1, the maximum number of retry attempts per message is set to %2 at %3 minutes between retries.
User Action No action is required. The values are set in the Delivery property sheet in Internet Service Manager.

489: Informational
Description   For SMTP site %1, the maximum number of retry attempts per message is set to %2.
User Action No action is required. This value is set in the Delivery property sheet in Internet Service Manager.

491: Informational
Description   Retry is disabled on SMTP site %1.
User Action No action is required. This value is set in the Delivery property sheet in Internet Service Manager.

492: Informational
Description   SMTP site %1 will use pipelining on outbound connections if the remote server supports it.
User Action No action is required. This value is set in the ShouldPipelineOut metabase property.

493: Informational
Description   SMTP site %1 will not use pipelining on outbound connections, even if the remote server supports it.
User Action No action is required. This value is set in the ShouldPipelineOut metabase property.

494: Informational
Description   SMTP site %1 will advertise pipelining support when clients connect.
User Action No action is required. This value is set in the ShouldPipelineIn metabase property.

495: Informational
Description   SMTP site %1 will not advertise pipelining support when clients connect.
User Action No action is required. This value is set in the ShouldPipelineIn metabase property.

496: Informational
Description   SMTP site %1 will send a copy of NDR messages to the user name specified in the Send a Copy of Non-Delivery Report to option in the Messages property sheet in Internet Service Manager.
User Action No action is required. This value is set in the Messages property sheet in Internet Service Manager.

497: Informational
Description   SMTP site %1 will not send a copy of NDR messages to the user name specified in the Send a Copy of Non-Delivery Report to option in the Messages property sheet in Internet Service Manager.
User Action No action is required. This value is set in the Messages property sheet in Internet Service Manager.

498: Informational
Description   SMTP site %1 will forward all bad messages to the user name specified in the Send a Copy of Badmail to option in the Messages property sheet in Internet Service Manager.
User Action No action is required. This value is set in the Messages property sheet in Internet Service Manager.

499: Informational
Description   A user name is not specified in the Send a Copy of Badmail to option in the Messages property sheet in Internet Service Manager. SMTP site %1 will store a copy of all invalid messages in the Badmail directory, if the directory is defined.
User Action No action is required. This directory is specified in the Messages property sheet in Internet Service Manager.

500: Informational
Description   For SMTP site %1, the smart host name is set to %2.
User Action No action is required. The smart host is set in the Delivery property sheet in Internet Service Manager.

501: Informational
Description   Smart host support is disabled for SMTP site %1.
User Action No action is required. The smart host is set in the Delivery property sheet in Internet Service Manager.

502: Informational
Description   If initial delivery fails, outbound messages for SMTP site %1 will be forwarded to smart host %2.
User Action No action is required. The smart host is set in the Delivery property sheet in Internet Service Manager.

503: Informational
Description   For SMTP site %1, outbound messages will be forwarded immediately to smart host %2 (without first trying to resolve the recipientÆs mail server).
User Action No action is required. The smart host is set in the Delivery property sheet in Internet Service Manager.

505: Informational
Description   For SMTP site %1, the Badmail directory is set to %2.
User Action No action is required. The Badmail directory is set in the Messages property sheet in Internet Service Manager.

506: Informational
Description   Undeliverable or corrupt mail (badmail) will not be saved for SMTP site %1.
User Action No action is required. The Badmail directory is set in the Messages property sheet in Internet Service Manager.

507: Informational
Description   For SMTP site %1, the default local domain is set to %2.
User Action No action is required. This value is set in the Domain property sheet in Internet Service Manager.

520: Error
Description   For SMTP site %1, the specified Drop directory (%2) is not valid. Microsoft SMTP Service cannot be started.
User Action This Drop directory can be set in the Domain property sheet in Internet Service Manager.

521: Informational
Description   SMTP cannot move message file %1 to the Drop directory. The message operation will be retried.
User Action Check for available disk space on the hard drive that holds the Drop directory.

525: Informational
Description   SMTP site %1 has finished initializing queues and accepting connections.
User Action No action is required.

527: Error
Description   Microsoft SMTP Service has been restarted while it is in the process of stopping.
If you have to call Microsoft Technical Support to fix this problem, report the return error code (%1).
User Action Restart the computer. If you continue to log this event, call Microsoft Technical Support.

528: Warning
Description   For SMTP site %1, the specified masquerade domain name is not correct according to RFC standards. The masquerade domain name will not be used for this session.
User Action Correct the masquerade name in the Delivery property sheet in Internet Service Manager.

530: Warning
Description   Domain %1 is found, but it will not be used. Domains must have a Drop directory in this version of Microsoft SMTP Service.
User Action Add a local domain with a Drop directory in the Domain property sheet in Internet Service Manager.

531: Informational
Description   Microsoft SMTP Service %1 has been started.
User Action No action is required.

534: Informational
Description   SMTP site %1 has been stopped.
User Action No action is required.

537: Informational
Description   SMTP site %1 has been paused.
User Action No action is required.

550: Informational
Description   Transport Layer Security (TLS) is required for all inbound connections to SMTP site %1.
User Action No action is required.

551: Informational
Description   SMTP site %1 will accept inbound connections whether or not they are secured using Transport Layer Security (TLS).
User Action No action is required.

552: Informational
Description   Transport Layer Security (TLS) with 128-bit encryption is required for all inbound connections to SMTP site %1.
User Action No action is required.

553: Informational
Description   Transport Layer Security (TLS) with either 40-bit or 128-bit encryption is required for all inbound connections to SMTP site %1.
User Action No action is required.

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