system admin e-mail address 这里设置要和发件人邮箱保持一致。
1.如果不保持一致报错如下图所示：
failed to send out e-mail
com.sun.mail.smtp.smtpsendfailedexception: 553 mail from must equal authorized user
;
nested exception is:
com.sun.mail.smtp.smtpsenderfailedexception: 553 mail from must equal authorized user2.邮件保持一致的配置如下图所示：
