我想使用 java 程序发送电子邮件.我得到的成绩如下

Question

我得到这个异常：

javax.mail.MessagingException: Unknown SMTP host: server.gmail.com;
  nested exception is:
    java.net.UnknownHostException: server.gmail.com
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1280)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
    at javax.mail.Service.connect(Service.java:275)
    at javax.mail.Service.connect(Service.java:156)
    at javax.mail.Service.connect(Service.java:105)
    at javax.mail.Transport.send0(Transport.java:168)
    at javax.mail.Transport.send(Transport.java:98)
    at com.SimpleSendEmail.main(SimpleSendEmail.java:33)
Caused by: java.net.UnknownHostException: server.gmail.com
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:529)
    at java.net.Socket.connect(Socket.java:478)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250)
    ... 7 more

我还包含了所需的 jar 文件。请帮我解决此异常。

Answer 1

尝试使用 smtp.gmail.com 作为主机。

Answer 2

您的 SMTP 主机显然是错误的

仅尝试smtp.gmail.com