OS: Fefora 21
javamail related jar files: /usr/share/java/javax.mail/javax.mail.jar
Also had my own mail.jar in the $TOMCAT_HOME/lib.
One workaround suggested adding the necessary mail.jar to the war file build. I went ahead and added the mail.jar to the application war. I also removed the mail.jar from the $TOMCAT_HOME/lib. All seems to be working fine with the changes.