The new snapshot has eliminated the NullPointerException, I now see the following in the job log:

00:42:56.447 Checking for post-build
00:42:56.447 Performing post-build step
00:42:56.447 Checking if email needs to be generated
00:42:56.447 Email was triggered for: Success
00:42:56.447 Sending email for trigger: Success
00:42:56.447 NOT overriding default server settings, using Mailer to create session
00:42:56.585 messageContentType = text/plain; charset=UTF-8
00:42:56.597 Request made to attach build log
00:42:56.613 Adding recipients from recipient list
00:42:56.618 Successfully created MimeMessage
00:42:56.618 Sending email to: MY.USERNAME@MYPLACEOFEMPLOYMENT.com
00:42:57.041 Error sending to the following VALID addresses: MY.USERNAME@MYPLACEOFEMPLOYMENT.com
00:42:57.068 Finished: SUCCESS

and basically nothing in the jenkins log:

Feb 21, 2013 7:05:53 PM hudson.model.Run execute
INFO: LE_Team_Test_Build #75 main build action completed: SUCCESS

I don't have access to modify the JVM options from home, so I'll make the change first thing tomorrow once I get into the office.

Thanks

Ok, I need to output the exception error, let me build another snapshot, sorry I didn't have that in before.

Try this one please

Ah that did it!

00:52:58.856 Checking for post-build
00:52:58.856 Performing post-build step
00:52:58.856 Checking if email needs to be generated
00:52:58.856 Email was triggered for: Success
00:52:58.856 Sending email for trigger: Success
00:52:58.856 NOT overriding default server settings, using Mailer to create session
00:52:58.950 messageContentType = text/plain; charset=UTF-8
00:52:58.953 Request made to attach build log
00:52:58.964 Adding recipients from recipient list
00:52:58.969 Successfully created MimeMessage
00:52:58.969 Sending email to: MY.USERNAME@MYPLACEOFEMPLOYMENT.com
00:52:59.341 Error sending to the following VALID addresses: MY.USERNAME@MYPLACEOFEMPLOYMENT.com
00:52:59.341 SendFailedException message: 552 4.3.1 Message size exceeds fixed maximum message size
00:52:59.341
00:52:59.342 Finished: SUCCESS

It appears my build log it too large to email (it runs in at about 5mb). I'll have to work out a way to write it to disk and compress it before trying to attach it. Thanks Alex, you've been super helpful!

I'll leave this open because of the NPE exception and leave the fix in that I have now.

Code changed in jenkins
User: Alex Earl
Path:
src/main/java/hudson/plugins/emailext/ExtendedEmailPublisher.java
http://jenkins-ci.org/commit/email-ext-plugin/9f207ef592417158ad01c711c1a6b9349c9edb5a
Log:
Fix JENKINS-16919

Fixed NPE by checking return of the getters for the SendFailedException.

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Fixed NPE when error occurs sending email.

Hi Alex,

I'm not entirely sure this is the right place to ask (actually I'm sure it isn't). I've added the option to compress the build log before attaching it to the email, I've tested the change on my local jenkins instance, and would like to push the change back into the email-ext repo, but I'm not sure what the process is, for now I've attached a git patch file to this ticket.

Best thing to do is fork the plugin on GitHub, make the changes and push to your fork then issue a pull request.

Cool, thanks. I'll try that... Time to go learn howto git!