No authentication mechansims supported by both server and client

2013-02-04 21:40:57,277 ERROR [JEMS] Sending mailitem To='xxxxxxxxxxx@xxxxxxxx.com' Subject='xxxxxxxxxxxxxx' From='null' FromName='Tish Jackson-Frey (JIRA)' Cc='null' Bcc='null' ReplyTo='null' InReplyTo='<JIRA.60580.1359750078420@JIRA>' MimeType='text/html' Encoding='UTF-8' Multipart='null' MessageId='null' ServiceRunner    Mail Queue Service Error occurred in sending e-mail: To='xxxxxxxxxx@xxxxxxxxx.com' Subject='yyyyyyyyyyyyyyy' From='null' FromName='zzzzzzzzzzzzz' Cc='null' Bcc='null' ReplyTo='null' InReplyTo='<JIRA.60580.1359750078420@JIRA>' MimeType='text/html' Encoding='UTF-8' Multipart='null' MessageId='null'
com.atlassian.mail.MailException: javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client
	at com.atlassian.mail.server.impl.SMTPMailServerImpl.sendWithMessageId(SMTPMailServerImpl.java:201)
	at com.atlassian.mail.queue.SingleMailQueueItem.send(SingleMailQueueItem.java:44)
	at com.atlassian.mail.queue.MailQueueImpl.sendBuffer(MailQueueImpl.java:66)
	at com.atlassian.jira.service.services.mail.MailQueueService.run(MailQueueService.java:28)
	at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:61)
	at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:47)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
	at com.atlassian.multitenant.quartz.MultiTenantThreadPool$MultiTenantRunnable.run(MultiTenantThreadPool.java:72)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
Caused by: javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client
	at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:760)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:673)
	at javax.mail.Service.connect(Service.java:317)
	at javax.mail.Service.connect(Service.java:176)
	at javax.mail.Service.connect(Service.java:125)
	at com.atlassian.mail.server.impl.SMTPMailServerImpl.sendWithMessageId(SMTPMailServerImpl.java:172)
	... 8 more