如何在使用 Java 发送电子邮件时防止调试代码？

Question

I am using a java program which sends an email to the addresses specified. The program works fine but it produces a lot of debug code in my console which is not needed. The statements that are producing the debug code are:

-------
 Session session = Session.getInstance(mailProperties, auth);
---
 transport = session.getTransport("smtp");
----
  transport.sendMessage(message, message.getAllRecipients());

Is there any way to prevent this? Btw, I am using mail.jar and activation.jar for sending the email.

Sample Debug Code:

250-SIZE
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250-XRDST
250 XSHADOW
DEBUG SMTP: Found extension "SIZE", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "DSN", arg ""
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "X-ANONYMOUSTLS", arg ""
DEBUG SMTP: Found extension "AUTH", arg "NTLM"
DEBUG SMTP: Found extension "X-EXPS", arg "GSSAPI NTLM"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "BINARYMIME", arg ""
DEBUG SMTP: Found extension "CHUNKING", arg ""
DEBUG SMTP: Found extension "XEXCH50", arg ""
DEBUG SMTP: Found extension "XRDST", arg ""
DEBUG SMTP: Found extension "XSHADOW", arg ""
DEBUG SMTP: use8bit false

Thanks in Advance.

Answer 1

From JavaMail API docs

public void setDebug(boolean debug)

Set the debug setting for this Session.

Since the debug setting can be turned on only after the Session has been created, to turn on debugging in the Session constructor, set the property mail.debug in the Properties object passed in to the constructor to true. The value of the mail.debug property is used to initialize the per-Session debugging flag. Subsequent calls to the setDebug method manipulate the per-Session debugging flag and have no affect on the mail.debug property.

Parameters: debug - Debug setting