javax.mail.MessagingException: IOException while sending message; OR javax.activation.UnsupportedDataTypeException

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Unable to send email or received email notification.

The following appears in the atlassian-confluence.log:

javax.mail.MessagingException: IOException while sending message; 
nested exception is:

Another symptom that you may find on space mail level is:

Confluence space mail is unable to read or process the email body. Example:

Subject: Documentation
From: "Hanis" <>
Date: February 03, 2013 12:49
javax.mail.util.SharedByteArrayInputStream@73bf9b0e ---> this is the body email.



activation-x.x.x.jar and mail-x.x.x.jar from /confluence/WEB-INF/lib were not moved over to <confluence-install>/lib (Tomcat 6)


 Ensure that both activation-x.x.x.jar and mail-x.x.x.jar from /confluence/WEB-INF/lib have been moved (but not copy) to <confluence-install>/lib (Tomcat 6)

(info) You may also refer here:













Last modified on Mar 30, 2016

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