Removed MailMessageMappers. MailMessageSendingConsumer now handles any MailMessage payload or byte array payload. For all other payload types, it calls 'toString' to generate the Mail text.

org.springframework.integration/src/main/java/org/springframework/integration/endpoint/AbstractMessageHandlingEndpoint.java

@@ -87,7 +87,7 @@ public abstract class AbstractMessageHandlingEndpoint extends AbstractMessageCon
 		if (result == null) {
 			if (this.requiresReply) {
 				throw new MessageHandlingException(message, "endpoint '" + this.getName()
-						+ " requires a reply, but no reply was received");
+						+ "' requires a reply, but no reply was received");
 			}
 			return;
 		}