我在Linux中使用JavaMail时遇到SocketException。
调试模式中的错误消息如下所示。
16:12:57,123 INFO [STDOUT] DEBUG: setDebug: JavaMail version 1.4.2
16:12:57,128 INFO [STDOUT] DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
16:12:57,130 INFO [STDOUT] DEBUG SMTP: useEhlo true, useAuth true
16:12:57,130 INFO [STDOUT] DEBUG SMTP: useEhlo true, useAuth true
16:12:57,130 INFO [STDOUT] DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 25, isSSL false
16:12:57,415 INFO [STDOUT] 220 smtp.gmail.com ESMTP z4sm29890425pge.49 - gsmtp
16:12:57,416 INFO [STDOUT] DEBUG SMTP: connected to host "smtp.gmail.com", port: 25
16:12:57,416 INFO [STDOUT]
16:12:57,416 INFO [STDOUT] EHLO testserver
16:12:57,639 INFO [STDOUT] 250-smtp.gmail.com at your service, [125.16.129.234]
16:12:57,639 INFO [STDOUT] 250-SIZE 35882577
16:12:57,640 INFO [STDOUT] 250-8BITMIME
16:12:57,640 INFO [STDOUT] 250-STARTTLS
16:12:57,640 INFO [STDOUT] 250-ENHANCEDSTATUSCODES
16:12:57,640 INFO [STDOUT] 250-PIPELINING
16:12:57,641 INFO [STDOUT] 250-CHUNKING
16:12:57,641 INFO [STDOUT] 250 SMTPUTF8
16:12:57,641 INFO [STDOUT] DEBUG SMTP: Found extension "SIZE", arg "35882577"
16:12:57,642 INFO [STDOUT] DEBUG SMTP: Found extension "8BITMIME", arg ""
16:12:57,642 INFO [STDOUT] DEBUG SMTP: Found extension "STARTTLS", arg ""
16:12:57,642 INFO [STDOUT] DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
16:12:57,642 INFO [STDOUT] DEBUG SMTP: Found extension "PIPELINING", arg ""
16:12:57,643 INFO [STDOUT] DEBUG SMTP: Found extension "CHUNKING", arg ""
16:12:57,643 INFO [STDOUT] DEBUG SMTP: Found extension "SMTPUTF8", arg ""
16:12:57,643 INFO [STDOUT] STARTTLS
16:12:57,644 INFO [STDOUT] DEBUG SMTP: exception reading response: java.net.SocketException: Connection reset
16:12:57,645 ERROR [STDERR] javax.mail.MessagingException: Exception reading response;
16:12:57,645 ERROR [STDERR] nested exception is:
16:12:57,645 ERROR [STDERR] java.net.SocketException: Connection reset
16:12:57,647 ERROR [STDERR] at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1764)
16:12:57,647 ERROR [STDERR] at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java:1632)
16:12:57,647 ERROR [STDERR] at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1483)
16:12:57,648 ERROR [STDERR] at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:462)
16:12:57,648 ERROR [STDERR] at javax.mail.Service.connect(Service.java:313)
16:12:57,648 ERROR [STDERR] at javax.mail.Service.connect(Service.java:172)
16:12:57,649 ERROR [STDERR] at javax.mail.Service.connect(Service.java:121)
16:12:57,649 ERROR [STDERR] at javax.mail.Transport.send0(Transport.java:190)
16:12:57,649 ERROR [STDERR] at javax.mail.Transport.send(Transport.java:120)
请帮助我理解为什么发生此套接字异常（连接重置）？
编辑：
解答：
我解决了这个问题。这是新的防火墙阻止。 防火墙已启用smtp端口，但不知何故还不够。
请关闭此票。