Only one email user out of 150 is unable to send mail anywhere though the user receives all emails. All other accounts are working fine. Log shows as follows

2013-08-21 15:34:31,178 INFO [qtp719953478-284797:http://192.168.1.4:80/service/soap/SendMsgRequest] [name=xyz@abc.com;mid=36;ip=192.168.1.7;ua=ZimbraWe bClient - FF22 (Win)/8.0.4_GA_5737;] SoapEngine - handler exception
com.zimbra.common.service.ServiceException: system failure: Unable to send message
ExceptionId:qtp719953478-284797:http://192.168.1.4:80/service/soap/S...2c39d08bbcc97b
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:258)
at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:686)
at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:448)
at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:403)
at com.zimbra.cs.service.mail.SendMsg.doSendMessage(S endMsg.java:234)
at com.zimbra.cs.service.mail.SendMsg.handle(SendMsg. java:166)
at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:522)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:385)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:258)
at com.zimbra.soap.SoapServlet.doWork(SoapServlet.jav a:293)
at com.zimbra.soap.SoapServlet.doPost(SoapServlet.jav a:209)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:727)
at com.zimbra.cs.servlet.ZimbraServlet.service(Zimbra Servlet.java:208)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:820)
at org.eclipse.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:652)
at org.eclipse.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1320)
at com.zimbra.cs.servlet.RequestStringFilter.doFilter (RequestStringFilter.java:52)
at org.eclipse.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1291)
at com.zimbra.cs.servlet.SetHeaderFilter.doFilter(Set HeaderFilter.java:57)
at org.eclipse.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1291)
at org.eclipse.jetty.servlets.UserAgentFilter.doFilte r(UserAgentFilter.java:82)
at org.eclipse.jetty.servlets.GzipFilter.doFilter(Gzi pFilter.java:256)
at org.eclipse.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1291)
at com.zimbra.cs.servlet.ETagHeaderFilter.doFilter(ET agHeaderFilter.java:45)
at org.eclipse.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1291)
at com.zimbra.cs.servlet.ZimbraQoSFilter.doFilter(Zim braQoSFilter.java:114)
at org.eclipse.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1291)
at org.eclipse.jetty.servlets.DoSFilter.doFilterChain (DoSFilter.java:473)
at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSF ilter.java:344)
at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSF ilter.java:315)
at org.eclipse.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1291)
at org.eclipse.jetty.servlet.ServletHandler.doHandle( ServletHandler.java:443)
at org.eclipse.jetty.server.handler.ScopedHandler.han dle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle( SecurityHandler.java:556)
at org.eclipse.jetty.server.session.SessionHandler.do Handle(SessionHandler.java:227)
at org.eclipse.jetty.server.handler.ContextHandler.do Handle(ContextHandler.java:1044)
at org.eclipse.jetty.servlet.ServletHandler.doScope(S ervletHandler.java:372)
at org.eclipse.jetty.server.session.SessionHandler.do Scope(SessionHandler.java:189)
at org.eclipse.jetty.server.handler.ContextHandler.do Scope(ContextHandler.java:978)
at org.eclipse.jetty.server.handler.ScopedHandler.han dle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCol lection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection .handle(HandlerCollection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.ha ndle(HandlerWrapper.java:116)
at org.eclipse.jetty.rewrite.handler.RewriteHandler.h andle(RewriteHandler.java:317)
at org.eclipse.jetty.server.handler.DebugHandler.hand le(DebugHandler.java:81)
at org.eclipse.jetty.server.handler.HandlerWrapper.ha ndle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java :369)
at org.eclipse.jetty.server.AbstractHttpConnection.ha ndleRequest(AbstractHttpConnection.java:486)
at org.eclipse.jetty.server.AbstractHttpConnection.co ntent(AbstractHttpConnection.java:944)
at org.eclipse.jetty.server.AbstractHttpConnection$Re questHandler.content(AbstractHttpConnection.java:1 005)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpPa rser.java:861)
at org.eclipse.jetty.http.HttpParser.parseAvailable(H ttpParser.java:240)
at org.eclipse.jetty.server.AsyncHttpConnection.handl e(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.han dle(SelectChannelEndPoint.java:668)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.r un(SelectChannelEndPoint.java:52)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run Job(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.r un(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.io.IOException: read past EOF
at org.apache.lucene.store.BufferedIndexInput.refill( BufferedIndexInput.java:223)
at org.apache.lucene.store.BufferedIndexInput.readByt e(BufferedIndexInput.java:39)
at org.apache.lucene.store.DataInput.readInt(DataInpu t.java:84)
at org.apache.lucene.store.BufferedIndexInput.readInt (BufferedIndexInput.java:169)
at org.apache.lucene.index.FieldsReader.detectCodeVer sion(FieldsReader.java:91)
at org.apache.lucene.index.SegmentInfos.read(SegmentI nfos.java:303)
at org.apache.lucene.index.DirectoryReader$1.doBody(D irectoryReader.java:79)
at org.apache.lucene.index.SegmentInfos$FindSegmentsF ile.run(SegmentInfos.java:754)
at org.apache.lucene.index.DirectoryReader.open(Direc toryReader.java:75)
at org.apache.lucene.index.IndexReader.open(IndexRead er.java:462)
at org.apache.lucene.index.IndexReader.open(IndexRead er.java:405)
at com.zimbra.cs.index.LuceneIndex.openIndexReader(Lu ceneIndex.java:299)
at com.zimbra.cs.index.LuceneIndex.openSearcher(Lucen eIndex.java:400)
at com.zimbra.cs.mailbox.MailboxIndex.existsInContact s(MailboxIndex.java:271)
at com.zimbra.cs.mailbox.Mailbox.newContactAddrs(Mail box.java:6965)
at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:531)
... 56 more
2013-08-21 15:34:31,179 INFO [qtp719953478-284797:http://192.168.1.4:80/service/soap/SendMsgRequest] [name=xyz@abc.com;mid=36;ip=192.168.1.7;ua=ZimbraWe bClient - FF22 (Win)/8.0.4_GA_5737;] soap - SendMsgRequest elapsed=10


This problem happened just 10 days ago and we have not changed anything in the server. All other accounts are working fine for incoming and outgoing emails.

Can anyone help me.

Thanks
-Sanjit