Exception in thread "main" org.springframework.mail.MailSendException; nested exception de
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是关于邮件发送的问题，在网上有找资料，说是包不兼容的问题，但是不知道怎么弄，大神，快点出来救救我吧。smtp用的qq的
Exception in thread "main" org.springframework.mail.MailSendException; nested exception details (1) are:
Failed message 1:
com.sun.mail.smtp.SMTPSendFailedException: 503 Error: need EHLO and AUTH first !
at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1275)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:895)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:524)
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:388)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:332)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:328)
at cn.hnedu.util.MailSender.sendFileMail(MailSender.java:48)
at cn.hnedu.util.MailSender.main(MailSender.java:54)
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