Just for the  record, we have fixed our problem.We did follow all steps and create our custom javamail bundle.When we installed this, and we removed the other two javamail bundles that are installed by default, we no longer get any linkage errors or other mail problems.

Thanks for this suggestion.However, for some reason this doesn't work in our instance. We have created this new bundle, with the copied export-package section, installed it and removed the other one, but we still keep getting the same error.That's why I was wondering/asking if some other step needs ...

We have a JBoss environment running AEM 6.5.In our implementation, we are trying to send an email, but we are encountering the linkageerror with the com.sun.mail classes.We did find this suggested fix (https://helpx.adobe.com/aem-forms/kb/day-cq-mail-service-not-working-forms-jee.html), but for some...