Index: container-spring/src/main/config/examples/smtpserver.xml
===================================================================
--- container-spring/src/main/config/examples/smtpserver.xml	(revision 1038037)
+++ container-spring/src/main/config/examples/smtpserver.xml	(working copy)
@@ -46,6 +46,9 @@
         <keystore>file://conf/keystore</keystore>
         <secret>yoursecret</secret>
         <provider>org.bouncycastle.jce.provider.BouncyCastleProvider</provider>
+        <!-- The algorithm is optional and only needs to be specified when using something other
+        than the Sun JCE provider. -->
+        <algorithm>SunX509</algorithm>
       </tls>
       
       <handler>
Index: netty-socket/src/main/java/org/apache/james/socket/netty/AbstractConfigurableAsyncServer.java
===================================================================
--- netty-socket/src/main/java/org/apache/james/socket/netty/AbstractConfigurableAsyncServer.java	(revision 1038037)
+++ netty-socket/src/main/java/org/apache/james/socket/netty/AbstractConfigurableAsyncServer.java	(working copy)
@@ -73,6 +73,13 @@
      */
     public static final String HELLO_NAME = "helloName";
     
+    // By default, use the Sun X509 algorithm that comes with the Sun JCE provider for SSL 
+    // certificates
+    private static final String defaultX509algorithm = "SunX509";
+    
+    // The X.509 certificate algorithm
+    private String x509Algorithm = defaultX509algorithm;
+    
     private FileSystem fileSystem;
 
     private Log logger;
@@ -236,6 +243,7 @@
                 throw new ConfigurationException("keystore needs to get configured");
             }
             secret = config.getString("tls.secret","");
+            x509Algorithm = config.getString("tls.algorithm", defaultX509algorithm);
         }
              
         doConfigure(config);
@@ -387,12 +395,11 @@
     
     private void buildSSLContext() throws Exception {
         if (useStartTLS || useSSL) {
-            String algorithm = "SunX509";
             KeyStore ks = KeyStore.getInstance("JKS");
             ks.load(new FileInputStream(fileSystem.getFile(keystore)), secret.toCharArray());
 
             // Set up key manager factory to use our key store
-            KeyManagerFactory kmf = KeyManagerFactory.getInstance(algorithm);
+            KeyManagerFactory kmf = KeyManagerFactory.getInstance(x509Algorithm);
             kmf.init(ks, secret.toCharArray());
 
             // Initialize the SSLContext to work with our key managers.