Learn how to troubleshoot the “Failure sending mail: One or more errors occurred” error in SSRS. Our SQL Server Support team is here to help you with your questions and concerns.

Troubleshooting SSRS Mail Sending Failure: One or More Errors Occurred

If you run into the following error message, our Experts have your back.

Failure sending mail: One or more errors occurred. Mail will not be resent.

This message lets us know that there is an issue with the email delivery process from SSRS.

Furthermore, the issue is not with the content or formatting of the emails, but with the underlying infrastructure and communication between SSRS and the SMTP server.

Common Causes

Let’s take a look at the common causes behind the error:

• The SMTP server settings in the SSRS configuration, such as the server name, port, and authentication method, may be incorrect. This will prevent successful email delivery.
• The SMTP server may need a secure connection but the SSRS configuration may not be set up properly to handle the secure connection. This will cause connectivity issues.
• The SMTP server can throttle or block the SSRS server due to high email volume. This will cause the email delivery to fail.

Troubleshooting Tips

We can troubleshoot and fix this error with these handy steps:

• First, check the SSRS log files for more error information and timestamps to correlate with the failed email deliveries. This will help identify the root cause.
• Then, carefully review the SMTP server settings in the SSRS configuration, like the server name, port, authentication method, and secure connection settings. Also, check that these settings match the requirements of the SMTP server.
• Next, use a standalone email client or PowerShell to test the email delivery process, bypassing SSRS. This helps us find out if the issue is specific to SSRS or if it’s related to the SMTP server itself.
• Also, check firewall rules or network issues that may be blocking the connection between SSRS and the SMTP server. Check the necessary ports and protocols are open and accessible.

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Conclusion

In brief, our Support Experts demonstrated how to troubleshoot the “Failure sending mail: One or more errors occurred” error in SSRS