Codebeamer でエラー「javax.mail.AuthenticationFailedException: 535 5.7.3 認証に失敗しました」が発生し、メールを送信できませんでした

WARN  com.intland.codebeamer.controller.admin.ConfigMailConnectionController - Test connection is failed: [catalina-exec-18] [205] {Req#=181, Sess#=6ae..ac4, serverId=server} 205
org.springframework.mail.MailSendException: Couldn't send email to XXXXXX from XXXXXX via server XXXXXX, user XXXXXX; 
nested exception is org.springframework.mail.MailAuthenticationException: Authentication failed; nested exception is javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful
	at com.intland.codebeamer.mail.MailTransporter.send(MailTransporter.java:140) ~[cb-2.1.0.0.jar:?]
	at com.intland.codebeamer.controller.MailConnectionSupport.sendTestEmail(MailConnectionSupport.java:87) ~[cb-2.1.0.0.jar:?]
	at com.intland.codebeamer.controller.admin.ConfigMailConnectionController.sendTestEmail(ConfigMailConnectionController.java:134) [cb-2.1.0.0.jar:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
Caused by: org.springframework.mail.MailAuthenticationException: Authentication failed; nested exception is javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful

	at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:440) ~[spring-context-support-5.3.27.jar:5.3.27]
	at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:361) ~[spring-context-support-5.3.27.jar:5.3.27]
	at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:356) ~[spring-context-support-5.3.27.jar:5.3.27]
	at com.intland.codebeamer.mail.MailTransporter.send(MailTransporter.java:128) ~[cb-2.1.0.0.jar:?]
	... 162 more
Caused by: javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful

	at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:965) ~[javax.mail-1.6.2.jar:1.6.2]
	at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:876) ~[javax.mail-1.6.2.jar:1.6.2]
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:780) ~[javax.mail-1.6.2.jar:1.6.2]
	at javax.mail.Service.connect(Service.java:366) ~[javax.mail-1.6.2.jar:1.6.2]