Make JIRA more secure to work with Gmail when configuring Outgoing SMTP server

2016-04-05 07:44:00,317 ERROR [] Sending mailitem To='example@email.com' Subject='Your account was created!' From='null' FromName='XXX' Cc='null' Bcc='null' ReplyTo='null' InReplyTo='null' MimeType='text/plain' Encoding='UTF-8' Multipart='javax.mail.internet.MimeMultipart@2def3c' MessageId='null' anonymous    Mail Queue Service Error occurred in sending e-mail: To='example@email.com' Subject='Your account was created!' From='null' FromName='XXX' Cc='null' Bcc='null' ReplyTo='null' InReplyTo='null' MimeType='text/plain' Encoding='UTF-8' Multipart='javax.mail.internet.MimeMultipart@2def3c' MessageId='null'
com.atlassian.mail.MailException: javax.mail.AuthenticationFailedException: 534-5.7.14 <https://accounts.google.com/signin/continue?sarp=x&xxx=x&xxx=xxxxxxxx
    534-5.7.14 xxxXXxxxXXXXXXXXXxXXXxXxXxXxXxXxXXXxXXXXX_XXxxxXXxXXXxXxXXxxXXxxXXXxxx
    534-5.7.14 xxxXXxx_XXXXXXXXXxXXXxXxXxXxXxXxXXXxXXXXXXXXxxxXXxXXXxXxXXxxXXxxXXXxxx
    534-5.7.14 xxxXXxxxXXXXXXXXXxXXXxXxXxXxXxXxXXXxXXXXXXXXxxxXXxXXXxXxXXxxXXxx-XXxxx
    534-5.7.14 xXX_xxxxXXXXXxXXXxXX-xxxXXXxX> Please log in via your web browser and
    534-5.7.14 then try again.
    534-5.7.14  Learn more at
    534 5.7.14  https://support.google.com/mail/answer/78754 b8sm33119713wjf.9 - gsmtp
    
	at com.atlassian.mail.server.impl.SMTPMailServerImpl.sendWithMessageId(SMTPMailServerImpl.java:214) [atlassian-mail-2.5.16.jar:?]
	at com.atlassian.mail.queue.SingleMailQueueItem.send(SingleMailQueueItem.java:44) [atlassian-mail-2.5.16.jar:?]
	at com.atlassian.mail.queue.MailQueueImpl.sendBuffer(MailQueueImpl.java:66) [atlassian-mail-2.5.16.jar:?]
	at com.atlassian.jira.mail.JiraMailQueue$1.apply(JiraMailQueue.java:51) [JiraMailQueue$1.class:?]
	at com.atlassian.jira.mail.JiraMailQueue$1.apply(JiraMailQueue.java:48) [JiraMailQueue$1.class:?]
	at com.atlassian.jira.util.velocity.DefaultVelocityRequestContextFactory.runWithStaticBaseUrl(DefaultVelocityRequestContextFactory.java:110) [DefaultVelocityRequestContextFactory.class:?]
	at com.atlassian.jira.util.DefaultBaseUrl.runWithStaticBaseUrl(DefaultBaseUrl.java:50) [DefaultBaseUrl.class:?]
	at com.atlassian.jira.mail.JiraMailQueue.sendBuffer(JiraMailQueue.java:48) [JiraMailQueue.class:?]
	at com.atlassian.jira.service.services.mail.MailQueueService.run(MailQueueService.java:21) [MailQueueService.class:?]
	at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:61) [JiraServiceContainerImpl.class:?]
	at com.atlassian.jira.service.ServiceRunner.runService(ServiceRunner.java:62) [ServiceRunner.class:?]
	at com.atlassian.jira.service.ServiceRunner.runServiceId(ServiceRunner.java:44) [ServiceRunner.class:?]
	at com.atlassian.jira.service.ServiceRunner.runJob(ServiceRunner.java:32) [ServiceRunner.class:?]
	at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:153) [atlassian-scheduler-core-1.7.0.jar:?]
	at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:118) [atlassian-scheduler-core-1.7.0.jar:?]
	at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:97) [atlassian-scheduler-core-1.7.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:401) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeLocalJob(CaesiumSchedulerService.java:369) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:347) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:255) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService$1.consume(CaesiumSchedulerService.java:252) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:65) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:59) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:34) [atlassian-scheduler-caesium-1.3.0.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]
Caused by: javax.mail.AuthenticationFailedException: 534-5.7.14 <https://accounts.google.com/signin/continue?sarp=x&xxx=x&xxx=xxxxxxxx
    534-5.7.14 xxxXXxxxXXXXXXXXXxXXXxXxXxXxXxXxXXXxXXXXX_XXxxxXXxXXXxXxXXxxXXxxXXXxxx
    534-5.7.14 xxxXXxx_XXXXXXXXXxXXXxXxXxXxXxXxXXXxXXXXXXXXxxxXXxXXXxXxXXxxXXxxXXXxxx
    534-5.7.14 xxxXXxxxXXXXXXXXXxXXXxXxXxXxXxXxXXXxXXXXXXXXxxxXXxXXXxXxXXxxXXxx-XXxxx
    534-5.7.14 xXX_xxxxXXXXXxXXXxXX-xxxXXXxX> Please log in via your web browser and
    534-5.7.14 then try again.
    534-5.7.14  Learn more at
    534 5.7.14  https://support.google.com/mail/answer/78754 b8sm33119713wjf.9 - gsmtp
    
	at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:893) [javax.mail-1.5.4.jar:1.5.4]
	at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:814) [javax.mail-1.5.4.jar:1.5.4]
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:728) [javax.mail-1.5.4.jar:1.5.4]
	at javax.mail.Service.connect(Service.java:386) [javax.mail-1.5.4.jar:1.5.4]
	at javax.mail.Service.connect(Service.java:245) [javax.mail-1.5.4.jar:1.5.4]
	at javax.mail.Service.connect(Service.java:194) [javax.mail-1.5.4.jar:1.5.4]
	at com.atlassian.mail.server.impl.SMTPMailServerImpl.sendWithMessageId(SMTPMailServerImpl.java:174) [atlassian-mail-2.5.16.jar:?]
	... 24 more