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Published Sep. 5, 2025

javax.mail.Provider: com.sun.mail.imap.IMAPProvider not a subtype

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Issue

  • I am encountering the following error when attempting to send emails using Jakarta Mail (version 2.0.1) within my Liferay environment.
 javax.mail.Provider:com.sun.mail.imap.IMAPProvider not a subtype 

Environment

  • Liferay DXP 7.4

Resolution

  • Liferay versions prior to the Jakarta namespace transition do not support jakarta.mail. You can learn more about the Jakarta namespace transition here:
  • For now, you need to continue using javax.mail or migrate your portlet code to use the Liferay mail API. 

 

 

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