421 Timeout waiting for data from client.

Question

客户端等待的时间过长
有可能是你发的包被阻止，或者在内存对列中等待时间过长

Answer 1

抓包 检查你发送的数据内容

Answer 2

com.sun.mail.smtp.SMTPSendFailedException: 421 Timeout waiting for data from client.
at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1275)
at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:1149)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:527)
at com.amazon.ses.SendMessageRunnable.startSendEmail(SendMessageRunnable.java:123)
at com.amazon.ses.SendMessageRunnable.run(SendMessageRunnable.java:59)
at java.lang.Thread.run(Thread.java:680)