2017-04-23 12:30:09.757 ERROR 7850 --- [sk-scheduler-10] o.s.integration.handler.LoggingHandler   : org.springframework.mail.MailSendException: Failed messages: javax.mail.SendFailedException: Invalid Addresses;
  nested exception is:
	com.sun.mail.smtp.SMTPAddressFailedException: 553 5.1.2 The recipient address <admin> is not a valid RFC-5321 address. d83sm23908021pfe.40 - gsmtp
; message exception details (1) are:
Failed message 1:
javax.mail.SendFailedException: Invalid Addresses;
  nested exception is:
	com.sun.mail.smtp.SMTPAddressFailedException: 553 5.1.2 The recipient address <admin> is not a valid RFC-5321 address. d83sm23908021pfe.40 - gsmtp

	at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:2014)
	at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1258)
	at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:448)
	at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:345)
	at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:340)
	at com.duniahalal.ecommerce.service.MailService.send(MailService.java:57)
	at com.duniahalal.ecommerce.service.ScheduledTask.unsentEmailTasks(ScheduledTask.java:66)
	at sun.reflect.GeneratedMethodAccessor83.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
	at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.sun.mail.smtp.SMTPAddressFailedException: 553 5.1.2 The recipient address <admin> is not a valid RFC-5321 address. d83sm23908021pfe.40 - gsmtp

	at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1867)
	... 18 more