felix felix.auto.start.1=file:bundle/org.apache.felix.framework-3.0.9.jar felix.auto.start.2= \ file:bundle/org.apache.felix.shell-1.4.1.jar \ file:bundle/org.apache.felix.shell.remote-1.1.2.jar osgi.console=6666 java -jar bin/felix.jar userManager Manifest-Version: 1.0 Bundle-ManifestVersion: 2 Bundle-Name: UserManager Bundle-SymbolicName: com.example.usermanager Bundle-Version: 1.0.0 Bundle-Activator: com.example.usermanager.Activator Import-Package: javax.mail package com.example.usermanager; import javax.mail.Session; import javax.naming.InitialContext; import javax.naming.NamingException; public class UserService { public void sendEmail(String emailAddress, String message) { try { InitialContext ctx = new InitialContext(); Session session = (Session) ctx.lookup("java:comp/env/mail/Session"); } catch (NamingException e) { e.printStackTrace(); } } } lb install file:/path/to/userManager.jar provision <Bundle ID> java:comp/env/mail/Session=javax.mail.Session