SMTP server down - Still server should not crash!

Question

Hi,
I'm using Weblogic 5.1 with service pack 9 installed and am using the
Process integrator environment with that. In my flow, when I send a mail
notification, in the situation that the SMTP mailserver is down, I do not
want to sent the mail message this time. Rather I want to have the mail sent
only after the SMTP host is available. How do I queue this mail message? Or
how can I build an listener interface that I can use to detect presence (or
absence) of the SMTP host.
Can I use the JMS services? if no, then what?
The exception (an obvious one) that I get is as follows :
javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.MessagingException: Unknown SMTP host: mySMTP.net;
nested exception is:
java.net.UnknownHostException: mySMTP.net
at javax.mail.Transport.send0(Transport.java:219)
at javax.mail.Transport.send(Transport.java:81)
at
com.bea.wlpi.server.workflow.action.ActionSendEMail.execute(ActionSendEMail.
java:185)
at
com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean.executeActions(W
orkflowProcessorBean.java, Compiled Code)
at
com.bea.wlpi.server.workflow.action.ActionCondition.execute(ActionCondition.
java:95)
at
com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean.executeActions(W
orkflowProcessorBean.java, Compiled Code)
at com.bea.wlpi.server.workflow.Start.activate(Start.java:124)
at
com.bea.wlpi.server.workflow.Workflow.instantiate(Workflow.java,Compiled
Code)
at
com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean$1.invoke(Workflo
wProcessorBean.java:709)
at
com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean.performWithError
HandlingWorkflowProcessorBean.java:1098)
at
com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBean.instantiate(Work
flowProcessorBean.java:705)
at
com.bea.wlpi.server.workflowprocessor.WorkflowProcessorBeanEOImpl.instantiat
eWorkflowProcessorBeanEOImpl.java:466)
at
com.bea.wlpi.server.eventprocessor.EventListener.checkTrigger(EventListener.
java, Compiled Code)
at
com.bea.wlpi.server.eventprocessor.EventListener.onMessage(EventListener.jav
a, Compiled Code)
at
weblogic.jms.client.JMSMessageConsumer.readQueue(JMSMessageConsumer.java,Com
piled Code)
at weblogic.jms.common.MessageQueue.execute(MessageQueue.java:748)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java,
CompiledCode)
Preyas

Answer 1

ian01 wrote:
I have read a great deal about 'authentication' and appreciate the reasons for this but still have some questions.
Until this weekend my wife has used our BT Home Hub ISP to send and receive email via her two own domain accounts that are not BT accounts - I always use my BT account.
Suddenly she cannot send - smtp not recognised
I have 'verified' her domain accounts and added to my BT account
I do not understand why I should put my account details (username and password) on her outgoing email account details
Surely a fundamental principle of wifi connections should be that someone, a casual visitor to my house for example, should not have to change accoutn details - certainly not have access to my username and password details, in order to use my ISP?
Or am I missing something?
Thanks
Ian
Hi Ian.
You can set up a BTinternet sub account for your wife, and use those details for verification and then put them into any mail client program.
I'm somewhat suprised that she was able to send non BTinternet emails using the BT mail servers without address verification, since this was introduced over 3 years ago! (Though over this time, it has seemed to "catch up with people" ...)
Since you are responsible for your connection, any casual visitor needs to either have their own way of sending emails (e.g. via webmail) or they will need to alter their mail client details. This is pretty much the same for all ISPs. Most will not allow emails to be sent from other ISP mail servers. If they use 3rd party mail servers, then this is usually unaffected.
http://www.andyweb.co.uk/shortcuts
http://www.andyweb.co.uk/pictures