Skip to main content

Support Article

SendFailedException: Invalid Addresses



You observe errors when sending email notifications to a large number of recipients at once.

Error Messages

2015-06-17 07:51:59,261 [] [TABTHREAD3] [ Ruleset:Version] (pega_integrationengine_default) ERROR Host|IP user- Unexpected exception caught while trying to send an email message.
javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
com.sun.mail.smtp.SMTPAddressFailedException: 452 Too many recipients received this hour

Steps to Reproduce

Send email notification to observe the error.

Root Cause

The root cause of this problem is defect/misconfiguration in the operating environment. The receiving email server IPS is throttling the sending SMTP email server.


This issue is resolved through the following Local-change:

​Update the sending email
server to set default number of recipients to 200 per hour
Suggest Edit

Published July 2, 2015 - Updated October 8, 2020

Did you find this content helpful?

100% found this useful

Have a question? Get answers now.

Visit the Collaboration Center to ask questions, engage in discussions, share ideas, and help others.

Ready to crush complexity?

Experience the benefits of Pega Community when you log in.

We'd prefer it if you saw us at our best.

Pega Community has detected you are using a browser which may prevent you from experiencing the site as intended. To improve your experience, please update your browser.

Close Deprecation Notice
Contact us