Unable to dispatch event: event[id: content.comment.validated, ...]
java.lang.NullPointerException
	at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1082)
	at org.ametys.core.util.mail.SendMailHelper.sendMail(SendMailHelper.java:356)
	at org.ametys.core.util.mail.SendMailHelper.sendMail(SendMailHelper.java:139)
	at org.ametys.core.util.mail.SendMailHelper.sendMail(SendMailHelper.java:116)
	at org.ametys.core.util.mail.SendMailHelper.sendMail(SendMailHelper.java:99)
	at org.ametys.web.repository.comment.SendMailToVisitorCommentListener._sendCommentValidatedNotificationMail(SendMailToVisitorCommentListener.java:243)
	at org.ametys.web.repository.comment.SendMailToVisitorCommentListener.observe(SendMailToVisitorCommentListener.java:101)
        [...]