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Support Article

SMTP with SSL configuration for outgoing mail does not work



Unable to configure SMTP on SSL for outgoing mails.

Error Messages

**Date and time**,046 [fault (self-tuning)'] [TABTHREAD1] [       PEGAApp:01.01.01] (pega_integrationengine_default) ERROR|HOST rhamel - Exception caught while testing connection to sslmsmtp as user test
javax.mail.MessagingException: Can't send command to SMTP host;
  nested exception is: PKIX path building failed:

Root Cause

Trust store of the application server must be populated to accept the SMTP server's security certificate or disable STARTTLS on the desired SMTP endpoint to make Pega application server's trust store work correctly with STARTTLS-enabled email infrastructure.


STARTTLS support can be disabled within PRPC. Store True value in a dynamic system setting record with keys given below:
Owning Ruleset: Pega-IntSvcs
Setting Purpose: Email/DisableSecuritySTARTTLS
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Published March 27, 2016 - Updated October 8, 2020

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