[wildfly-dev] JavaMail provider module and jboss-deployment-structure.xml

I have a custom JavaMail provider installed as a module in Wildfly 10. In the configuration, I specify a mail session using the custom provider like this: <mail-session name="rcpt" jndi-name="FixedRecipient"> <custom-server name="FixedRecipient"> <!-- configuration properties hee --> </custom-server> </mail-session> If I make the provider a global module in the configuration, a deployment can successfully use the provider. However, if I specify the provider as module dependency in jboss-deployment-structure.xml, when trying to create a javax.mail.Session using the provider, a NoSuchProviderException is thrown (as though the base Session implementation cannot find a META-INF/javamail.providers mapping that identifies the custom provider). I don't know whether specifying the provider as a deployment structure dependency should work or not, but it seems like it should. Can someone please explain? carl