That fixed it.
I also did:-
chown zimbra:root -R /opt/zimbra/jetty/logs/
Now it starts up all god, no 404 error.
I just get this now:-
Message not sent; one or more addresses were not accepted.
Rejected addresses:EXTERNAL@EMAIL.COM
method: [unknown]
msg: Invalid address:EXTERNAL@EMAIL.COM com.zimbra.cs.mailbox.MailSender$SafeSendFailedExc eption: MESSAGE_NOT_DELIVERED; chained exception is: com.zimbra.cs.mailclient.smtp.InvalidRecipientExce ption: RCPT failed: Invalid recipient
EXTERNAL@EMAIL.COM: 554 5.7.1 : Relay access denied
code: mail.SEND_ABORTED_ADDRESS_FAILURE
detail: soap:Sender
trace: com.zimbra.cs.mailbox.MailServiceException: Invalid address:
EXTERNAL@EMAIL.COM. com.zimbra.cs.mailbox.MailSender$SafeSendFailedExc eption: MESSAGE_NOT_DELIVERED; chained exception is: com.zimbra.cs.mailclient.smtp.InvalidRecipientExce ption: RCPT failed: Invalid recipient
EXTERNAL@EMAIL.COMt: 554 5.7.1 : Relay access denied ExceptionId:btpool0-14://MYMAILSRV.com/service/soap/SendMsgRequest:1301579172296:e0096983d1c5f776 Code:mail.SEND_ABORTED_ADDRESS_FAILURE Arg

invalid, STR, "EXTERNAL@EMAIL.COM") at com.zimbra.cs.mailbox.MailServiceException.interna l_SEND_FAILURE(MailServiceException.java:458) at com.zimbra.cs.mailbox.MailServiceException.SEND_AB ORTED_ADDRESS_FAILURE(MailServiceException.java:46 2) at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:619) at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:425) at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:385) at com.zimbra.cs.service.mail.SendMsg.doSendMessage(S endMsg.java:193) at com.zimbra.cs.service.mail.SendMsg.handle(SendMsg. java:154) at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:401) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:276) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:157) at com.zimbra.soap.SoapServlet.doWork(SoapServlet.jav a:294) at com.zimbra.soap.SoapServlet.doPost(SoapServlet.jav a:215) 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.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1166) at com.zimbra.cs.servlet.SetHeaderFilter.doFilter(Set HeaderFilter.java:79) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at org.mortbay.servlet.UserAgentFilter.doFilter(UserA gentFilter.java:81) at org.mortbay.servlet.GzipFilter.doFilter(GzipFilter .java:132) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:218) at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:422) at org.mortbay.jetty.handler.ContextHandlerCollection .handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle (HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.handler.rewrite.RewriteHandler.h andle(RewriteHandler.java:230) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.handler.DebugHandler.handle(Debu gHandler.java:77) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:543) at org.mortbay.jetty.HttpConnection$RequestHandler.co ntent(HttpConnection.java:946) at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:405) at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:410) at org.mortbay.thread.BoundedThreadPool$PoolThread.ru n(BoundedThreadPool.java:451) Caused by: com.zimbra.cs.mailbox.MailSender$SafeSendFailedExc eption: MESSAGE_NOT_DELIVERED; chained exception is: com.zimbra.cs.mailclient.smtp.InvalidRecipientExce ption: RCPT failed: Invalid recipient
EXTERNAL@EMAIL.COMt: 554 5.7.1 : Relay access denied at com.zimbra.cs.mailclient.smtp.SmtpTransport.notify (SmtpTransport.java:291) at com.zimbra.cs.mailclient.smtp.SmtpTransport.sendMe ssage(SmtpTransport.java:222) at com.zimbra.cs.mailbox.MailSender.sendMessageToHost (MailSender.java:895) at com.zimbra.cs.mailbox.MailSender.sendMessage(MailS ender.java:831) at com.zimbra.cs.mailbox.MailSender.sendMimeMessage(M ailSender.java:565) ... 39 more