Enabled the notification on the GUI for the Admin user and no emails were sent.
Edited the Javamail-configuration.xml and used gmail the notifications worked.
Find Here is the configuration for gmail.
When changed the gmail to the local mail server got multiple of errors

• canot sent command to smtp host

• unable to find valid certification path to request target

• PKIX path building failed
  ...
  I have included the log file hereunder

Log file:

2011-04-20 22:43:19,630 ERROR [Thread-62265] JavaMailNotificationStrategy: send:
Error sending notification.
org.opennms.javamail.JavaMailerException: Java Mailer messaging exception: javax
.mail.MessagingException: Can't send command to SMTP host;
nested exception is:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorExc
eption: PKIX path building failed: sun.security.provider.certpath.SunCertPathBui
lderException: unable to find valid certification path to requested target
at org.opennms.javamail.JavaMailer.sendMessage(JavaMailer.java:459)
at org.opennms.javamail.JavaMailer.mailSend(JavaMailer.java:256)
at org.opennms.netmgt.notifd.JavaMailNotificationStrategy.send(JavaMailN
otificationStrategy.java:72)
at org.opennms.netmgt.notifd.ClassExecutor.execute(ClassExecutor.java:71
)
at org.opennms.netmgt.notifd.NotificationTask.run(NotificationTask.java:
282)
Caused by: javax.mail.MessagingException: Can't send command to SMTP host;
nested exception is:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorExc
eption: PKIX path building failed: sun.security.provider.certpath.SunCertPathBui
lderException: unable to find valid certification path to requested target
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1564)
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1551)
at com.sun.mail.smtp.SMTPTransport.ehlo(SMTPTransport.java:935)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:42
6)
at javax.mail.Service.connect(Service.java:288)
at org.opennms.javamail.JavaMailer.sendMessage(JavaMailer.java:446)
... 4 more
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.Validator
Exception: PKIX path building failed: sun.security.provider.certpath.SunCertPath
BuilderException: unable to find valid certification path to requested target
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:150)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1
584)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:174)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:168)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Clien
tHandshaker.java:848)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHa
ndshaker.java:106)
at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:4
95)
at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.jav
a:433)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.j
ava:877)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SS
LSocketImpl.java:1089)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.
java:618)
at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.ja
va:59)
at com.sun.mail.util.TraceOutputStream.write(TraceOutputStream.java:114)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65
)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1562)
... 9 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find vali
d certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:221)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.jav
a:145)
at sun.security.validator.Validator.validate(Validator.java:203)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(
X509TrustManagerImpl.java:172)
at com.sun.net.ssl.internal.ssl.JsseX509TrustManager.checkServerTrusted(
SSLContextImpl.java:320)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Clien
tHandshaker.java:841)
... 20 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to
find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCert
PathBuilder.java:236)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:194)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:216)
... 25 more
2011-04-20 22:43:36,895 INFO [Notifd:BroadcastEventProcessor] EventIpcManagerDe
faultImpl: run: calling onEvent on Notifd:BroadcastEventProcessor for event uei.
opennms.org/internal/authentication/successfulLogin dbid 0 with time Wednesday,
April 20, 2011 7:43:36 PM GMT
2011-04-20 22:43:36,935 INFO [Notifd:BroadcastEventProcessor] EventIpcManagerDe
faultImpl: run: calling onEvent on Notifd:BroadcastEventProcessor for event uei.
opennms.org/internal/authentication/successfulLogin dbid 0 with time Wednesday,
April 20, 2011 7:43:36 PM GMT
2011-04-20 22:43:36,963 INFO [Notifd:BroadcastEventProcessor] EventIpcManagerDe

Gmail Config:
Edit Javamail-configuration.xml to set SMTP information
org.opennms.core.utils.fromAddress=FromMailID@gmail.com
org.opennms.core.utils.useJMTA=false
org.opennms.core.utils.transport=smtp
org.opennms.core.utils.mailHost=smtp.gmail.com
org.opennms.core.utils.smtpport=587
org.opennms.core.utils.smtpssl.enable=false
org.opennms.core.utils.authenticate=true
org.opennms.core.utils.authenticateUser=ToMailID@gmail.com
org.opennms.core.utils.authenticatePassword=passwordorg.opennms.core.utils.starttls.enable=true
org.opennms.core.utils.messageContentType=text/html
org.opennms.core.utils.charset=UTF-8
Edit notifd-configuration.xml to enable notification
status="on"
Example:
notifd-configuration
status="on"
pages-sent="SELECT * FROM notifications"
next-notif-id="SELECT nextval('notifynxtid')"
next-group-id="SELECT nextval('notifygrpid')"
User mail configuration for notification:
As per your need you can configure the duty schedules.