Skip to main content

This content has been archived and is no longer being updated. Links may not function; however, this content may be relevant to outdated versions of the product.

Support Article

Email Server rules unable to connect to Office365



Email Server rules are unable to connect to Office365. Username, password, port, host, and SSL options have all been verified.

Error Messages

MessagingException caught connecting to email server; javax.mail.MessagingException: Connection refused; nested exception is: Connection refused

Steps to Reproduce

1. Configure Email Server rule with Office365 connection details.
2. Run Test Connection.

Root Cause

The root cause of this problem is in a third-party product. The Office365 server is configured to require NTLM authentication.


PRPC 6.1 SP1 does not support NTLM email authentication, another form of authentication needs to be used.

Published July 23, 2015 - Updated October 8, 2020

Was this useful?

0% found this useful

Have a question? Get answers now.

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

Did you find this content helpful?

Want to help us improve this content?

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