Sending notifications causes exception in javamailer if user is missing smtp adress

If notification is sent to multiple users exception is generated if any of the users are missing smtp address, and notification is sent to none of the reciptients:

2011-01-26 01:53:51,509 ERROR [Thread-303637] JavaMailNotificationStrategy: send: Error sending notification.
org.opennms.javamail.JavaMailerException: Cannot have an empty to address.
at org.opennms.javamail.JavaMailer.checkEnvelopeAndContents(JavaMailer.java:410)
at org.opennms.javamail.JavaMailer.buildMessage(JavaMailer.java:286)
at org.opennms.javamail.JavaMailer.mailSend(JavaMailer.java:256)
at org.opennms.netmgt.notifd.JavaMailNotificationStrategy.send(JavaMailNotificationStrategy.java:72)
at org.opennms.netmgt.notifd.ClassExecutor.execute(ClassExecutor.java:71)
at org.opennms.netmgt.notifd.NotificationTask.run(NotificationTask.java:282)

It would be better to log specifically about user missing SMTP adress, and leave it out, and only if no usable recipients are found to warn about that.