Index: connector/src/main/java/org/jboss/resource/adapter/mail/inflow/NewMsgsWorker.java
===================================================================
--- connector/src/main/java/org/jboss/resource/adapter/mail/inflow/NewMsgsWorker.java	(revision 108866)
+++ connector/src/main/java/org/jboss/resource/adapter/mail/inflow/NewMsgsWorker.java	(working copy)
@@ -80,7 +80,9 @@
                long now = System.currentTimeMillis();
                long nextTime = ma.getNextNewMsgCheckTime();
                long sleepMS = nextTime - now;
-               Thread.sleep(sleepMS);
+               if (sleepMS > 0) {
+                   Thread.sleep(sleepMS);
+               }
                if( released )
                   break;
                // This has to go after the sleep otherwise we can get into an inconsistent state