We have a batch program that incorporates JavaMail 1.2 that sends emails. In our development environment, we haven't got the chance to encounter the above mentioned exception. But in the client'
s environment, they had experienced this a lot of times with the following error trace:
javax.mail.MessagingException: 550 Requested action not taken: NUL characters are not allowed.
at
com.sun.mail.smtp.SMTPTransport.issueCommand (SMTPTransport.java: 879)
at
com.sun.mail.smtp.SMTPTransport.finishData (SMTPTransport.java: 820)
at
com.sun.mail.smtp.SMTPTransport.sendMessage (SMTPTransport.java: 322)
...
I'm not sure if this is connected to my problem, http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4697158. But trying JavaMail 1.4.2, I see that the content transfer encoding of the email is still 7bit, so I'm not sure if using JavaMail 1.4.2 could solve the problem. Please take note that I could only do testing in our development environment that hasn't been able to replicate this.
With the above exception, how would i know if this is from the sender or the receiver side? What debugging steps could you suggest?
EDIT:
Here is a DEBUG of the actual sending (masked some information):
DEBUG: not loading system providers in <java.home></a>/lib
DEBUG: not loading optional custom providers file: /META-INF/javamail.providers
DEBUG: successfully loaded default providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,
com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc],
com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,
com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc],
com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,
com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc]}
DEBUG: Providers Listed By Protocol: {imap=javax.mail.Provider[STORE,imap,
com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], pop3=javax.mail.Provider[STORE,pop3,
com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc], smtp=javax.mail.Provider[TRANSPORT,smtp,
com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]}
DEBUG: not loading optional address map file: /META-INF/javamail.address.map
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,
com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG: SMTPTransport trying to connect to host "nnn.nnn.n.nnn", port nn
DEBUG SMTP RCVD: 220 xxxx.xxxxxxxxxxx.xxx SMTP; Mon, 23 Mar 2009 15:18:57 +0800
DEBUG: SMTPTransport connected to host "nnn.nnn.n.nnn", port: nn
DEBUG SMTP SENT: EHLO xxxxxxxxx
DEBUG SMTP RCVD: 250 xxxx.xxxxxxxxxxx.xxx Hello
DEBUG SMTP: use8bit false
DEBUG SMTP SENT: MAIL FROM:<a href="newmsg.cgi?mbx=Main&
[email protected]"><
[email protected]></a>
DEBUG SMTP RCVD: 250 <a href="newmsg.cgi?mbx=Main&
[email protected]"><
[email protected]></a>... Sender ok
DEBUG SMTP SENT: RCPT TO:<
[email protected]>
DEBUG SMTP RCVD: 250 <
[email protected]>... Recipient ok
Verified Addresses
[email protected]
DEBUG SMTP SENT: DATA
DEBUG SMTP RCVD: 354 Enter mail, end with "." on a line by itself
DEBUG SMTP SENT:
.
DEBUG SMTP RCVD: 550 Requested action not taken: NUL characters are not allowed.
