Description of problem:
I do not want to discuss if it is wise or not, but the fact is, it is not possible.

FYI SSL here means dedicated port, not STARTTLS. Please ignore that I have 587 as port there, OK? (notifier is broken anyway to accept any other port, BZ1020900).

Yes docs says when MAIL_ENABLE_SSL is true, you have to have MAIL_USER and MAIL_PASSWORD defined. But really? Why? What about internal smtp which do not need AUTH?

Description of problem:

#>> scenario 1 (ssl no auth, MAIL_USER undefined, service dead)

-%-
# cat /etc/ovirt-engine/notifier/notifier.conf
MAIL_SERVER=$out_internal_smtp
MAIL_PORT=25
MAIL_PORT_SSL=587
MAIL_USER=
MAIL_PASSWORD=
MAIL_ENABLE_SSL=true
HTML_MESSAGE_FORMAT=false
MAIL_FROM=ovirt.lab.eng.brq.redhat.com
MAIL_REPLY_TO=
DAYS_TO_KEEP_HISTORY=0
DAYS_TO_SEND_ON_STARTUP=0

# /etc/init.d/ovirt-engine-notifier status
ovirt-engine-notifier dead but pid file exists
-%-

Service is dead. MAIL_USER must be set when SSL is enabled or when password is set.

-%-
2013-10-18 14:53:31,874 ERROR [org.ovirt.engine.core.notifier.Notifier] Failed to run the event notification service. 
java.lang.IllegalArgumentException: MAIL_USER must be set when SSL is enabled or when password is set
        at org.ovirt.engine.core.notifier.utils.sender.mail.JavaMailSender.setCommonProperties(JavaMailSender.java:86)
        at org.ovirt.engine.core.notifier.utils.sender.mail.JavaMailSender.<init>(JavaMailSender.java:41)
        at org.ovirt.engine.core.notifier.utils.sender.mail.EventSenderMailImpl.<init>(EventSenderMailImpl.java:37)
        at org.ovirt.engine.core.notifier.methods.NotificationMethodFactoryEmailImpl.<init>(NotificationMethodFactoryEmailImpl.java:17)
        at org.ovirt.engine.core.notifier.methods.NotificationMethodMapBuilder.createMethodsMapper(NotificationMethodMapBuilder.java:69)
        at org.ovirt.engine.core.notifier.NotificationService.initMethodMapper(NotificationService.java:209)
        at org.ovirt.engine.core.notifier.NotificationService.initConfigurationProperties(NotificationService.java:83)
        at org.ovirt.engine.core.notifier.NotificationService.<init>(NotificationService.java:59)
        at org.ovirt.engine.core.notifier.Notifier.main(Notifier.java:108)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.jboss.modules.Module.run(Module.java:292)
        at org.jboss.modules.Main.main(Main.java:455)
2013-10-18 14:53:31,924 INFO  [org.ovirt.engine.core.notifier.Notifier] Preparing for shutdown after receiving signal 
2013-10-18 14:53:31,924 INFO  [org.ovirt.engine.core.notifier.Notifier] Event Notification service was shutdown
-%-

##> scenario 2 (ssl no auth, MAIL_USER defined, service runs)

-%-
# cat /etc/ovirt-engine/notifier/notifier.conf
MAIL_SERVER=smtp.corp.redhat.com
MAIL_PORT=25
MAIL_PORT_SSL=587
MAIL_USER=ovirt.lab.eng.brq.redhat.com
MAIL_PASSWORD=
MAIL_ENABLE_SSL=true
HTML_MESSAGE_FORMAT=false
MAIL_FROM=
MAIL_REPLY_TO=
DAYS_TO_KEEP_HISTORY=0
DAYS_TO_SEND_ON_STARTUP=0

# /etc/init.d/ovirt-engine-notifier status
ovirt-engine-notifier (pid  22935) is running...
-%-

Service runs. So I defined just MAIL_USER, but again sending does not work...

-%-
2013-10-18 15:03:07,354 ERROR [org.ovirt.engine.core.notifier.utils.sender.mail.JavaMailSender] Failed to send message  from ovirt.lab.eng.brq.redhat.com to jbelka with subject Issue Solved Notification. (jb-rh33.rhev.lab.eng.brq.redhat.com), [Migration completed (VM: jb-w8-x86, Source: dell-r210ii-03, Destination: dell-r210ii-13, Duration: 44 sec).] due to to error: failed to connect, no password specified?
javax.mail.AuthenticationFailedException: failed to connect, no password specified?
        at javax.mail.Service.connect(Service.java:329)
        at javax.mail.Service.connect(Service.java:176)
        at javax.mail.Service.connect(Service.java:125)
        at org.ovirt.engine.core.notifier.utils.sender.mail.JavaMailSender.send(JavaMailSender.java:160)
        at org.ovirt.engine.core.notifier.utils.sender.mail.EventSenderMailImpl.send(EventSenderMailImpl.java:79)
        at org.ovirt.engine.core.notifier.NotificationService.processEvents(NotificationService.java:263)
        at org.ovirt.engine.core.notifier.NotificationService.run(NotificationService.java:120)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:724)

-%-

SSL with AUTH (MAIL_USER and MAIL_PASSWORD defined) works but I don't want to put my password into config, especially if it would _NOT_ be needed for my smtp server.

Version-Release number of selected component (if applicable):
is19

How reproducible:
100%

Steps to Reproduce:
1. have no MAIL_USER defined, restart notifier
2. have MAIL_USER defined but not MAIL_PASSWORD, restart notifier


Actual results:
1. service dead, MAIL_USER *must* be defined
2. service runs, but does not send

Expected results:
do not force me to use SSL with AUTH. Give me gun to shoot my foot, ok?

Additional info:
why is it dead for missing MAIL_USER but running for missing MAIL_PASSWORD? this is odd.