Deploying a custom Mailet results in ClassNotFound exception

Hi,

I created a custom Mailet and created a jar file from it. I copied the custom-mailet.jar into $JAMES_HOME/conf/lib folder as suggested by $JAMES_HOME/bin/setenv.sh. Then I copied $JAMES_HOME/conf/mailetcontainer-template.conf to $JAMES_HOME/conf/mailetcontainer.conf and added the following line below <processor state="transport" enableJmx="true">
<mailet match="All" class="com.company.CustomMailet"/> which is the full classpath of the Mailet that I added with custom-mailet.jar

However, when I want to (re-)start James, the server crashes with the following exception:

Caused by: java.lang.ClassNotFoundException: com.company.CustomMailet
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at org.apache.james.container.spring.bean.factory.mailetcontainer.AbstractLoaderBeanFactory.load(AbstractLoaderBeanFactory.java:44)
at org.apache.james.container.spring.bean.factory.mailetcontainer.MailetLoaderBeanFactory.getMailet(MailetLoaderBeanFactory.java:45)
... 29 more

To my understanding, James does not find the class that I added with $JAMES_HOME/conf/lib/custom-mailet.jar. Is this a bug or am I doing something wrong?

Thanks!