JavaMail出现535 5.7.3 Authentication unsuccessful错误的解决方法

最近实现使用公司内部邮箱发送邮件功能，发送给本公司邮箱时没有问题，但是给QQ、163或sina等外部邮箱时一直出现错误：

com.sun.mail.smtp.SMTPAddressFailedException: 550 5.7.1 Unable to relay

此时的java mail 版本为1.4.1，升级到1.4.7之后这个问题就没有了。但是出现了错误：

535 5.7.3 Authentication unsuccessful

在邮箱配置文件中设置mail.debug为true，在控制台中查看发送邮件时输出的内容：

DEBUG: JavaMail version 1.4.7DEBUG: successfully loaded resource: /META-INF/javamail.default.providersDEBUG: Tables of loaded providersDEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle]}DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]}DEBUG: successfully loaded resource: /META-INF/javamail.default.address.mapDEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]DEBUG SMTP: useEhlo true, useAuth trueDEBUG SMTP: trying to connect to host "exchange.xxxxxxx.com.cn", port 25, isSSL false220 excas1.logic-cn.com Microsoft ESMTP MAIL Service ready at Tue, 28 Apr 2015 18:44:53 +0800DEBUG SMTP: connected to host "exchange.logicsolutions.com.cn", port: 25EHLO xxx.xxx.xxx.xxx//ip地址250-excas1.xxxx-cn.com Hello [xxx.xxx.xxx.xxx]250-SIZE 37748736250-PIPELINING250-DSN250-ENHANCEDSTATUSCODES250-STARTTLS250-X-ANONYMOUSTLS250-AUTH NTLM250-X-EXPS GSSAPI NTLM250-8BITMIME250-BINARYMIME250-CHUNKING250 XRDSTDEBUG SMTP: Found extension "SIZE", arg "37748736"DEBUG SMTP: Found extension "PIPELINING", arg ""DEBUG SMTP: Found extension "DSN", arg ""DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""DEBUG SMTP: Found extension "STARTTLS", arg ""DEBUG SMTP: Found extension "X-ANONYMOUSTLS", arg ""DEBUG SMTP: Found extension "AUTH", arg "NTLM"DEBUG SMTP: Found extension "X-EXPS", arg "GSSAPI NTLM"DEBUG SMTP: Found extension "8BITMIME", arg ""DEBUG SMTP: Found extension "BINARYMIME", arg ""DEBUG SMTP: Found extension "CHUNKING", arg ""DEBUG SMTP: Found extension "XRDST", arg ""DEBUG SMTP: Attempt to authenticate using mechanisms: NTLMDEBUG NTLM: type 1 message: 4E 54 4C 4D 53 53 50 00 01 00 00 00 03 A2 00 00 00 00 00 00 23 00 00 00 03 00 03 00 20 00 00 00 31 39 32 DEBUG SMTP: AUTH NTLM command trace suppressedDEBUG NTLM: type 3 message: 4E 54 4C 4D 53 53 50 00 03 00 00 00 18 00 18 00 86 00 00 00 18 00 18 00 9E 00 00 00 00 00 00 00 40 00 00 00 40 00 40 00 40 00 00 00 06 00 06 00 80 00 00 00 00 00 00 00 B6 00 00 00 01 82 00 00 72 00 65 00 63 00 72 00 75 00 69 00 74 00 69 00 6E 00 67 00 40 00 6C 00 6F 00 67 00 69 00 63 00 73 00 6F 00 6C 00 75 00 74 00 69 00 6F 00 6E 00 73 00 2E 00 63 00 6F 00 6D 00 2E 00 63 00 6E 00 31 00 39 00 32 00 83 BF 3A A6 03 EF 29 16 17 C7 7E 2A AF 63 C0 24 C7 D1 87 84 53 D1 16 DA 7D 9F D1 2D 63 E0 48 AD 9D 21 FA 53 E8 C9 72 16 A6 E6 33 9A 2B 9A C1 89 DEBUG SMTP: AUTH NTLM failed

可见问题是由：AUTH NTLM failed引起的。

修改配置文件中的邮箱配置：

<bean id="mail" class="org.springframework.mail.javamail.JavaMailSenderImpl">

<span style="white-space:pre"></span><property name="host" value="${mail.smtp.host}" /><property name="port" value="${mail.smtp.port}" /><property name="username" value="${mail.user}" /><property name="password" value="${mail.password}" />  <property name="javaMailProperties"> <span style="white-space:pre"></span><props>            <prop key="mail.transport.protocol">smtp</prop>            <prop key="mail.smtp.auth">true</prop>            <prop key="mail.debug">true</prop>           <prop key="mail.smtp.auth.mechanisms">NTLM</prop>     <prop key="mail.smtp.auth.ntlm.domain">xxxx-cn.com</prop>        </props> </property></bean>

需要注意的是username是登陆邮箱是的用户名而不是邮箱，password是登陆邮箱的密码，mail.smtp.auth.ntlm.domain是邮箱服务器的domain。