SMTP is broken in the stand-alone config

An error has occurred with sending the test email:
javax.mail.NoSuchProviderException: smtp
at javax.mail.Session.getService(Session.java:611)
at javax.mail.Session.getTransport(Session.java:541)
at javax.mail.Session.getTransport(Session.java:484)
at javax.mail.Session.getTransport(Session.java:464)
at alt.javax.mail.SessionImpl.getTransport(SessionImpl.java:77)
at com.atlassian.mail.server.impl.SMTPMailServerImpl.send(SMTPMailServerImpl.java:168)

To fix, we need to remove activation.jar and mail.jar from common/lib