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NullPointer Exception after replying to a post.

 
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Got this exception after replying to a post. what happened? my SMTP server is working fine on the local host (test it with sendmail).

Sending mail to: abc@gmail.com
Exception in thread "Thread-46" java.lang.NullPointerException
at java.lang.String.concat(String.java:1827)
at com.sun.activation.registries.MailcapFile.parseLine(MailcapFile.java:235)
at com.sun.activation.registries.MailcapFile.parse(MailcapFile.java:197)
at com.sun.activation.registries.MailcapFile.createMailcapHash(MailcapFile.java:157)
at com.sun.activation.registries.MailcapFile.<init>(MailcapFile.java:40)
at javax.activation.MailcapCommandMap.loadFile(MailcapCommandMap.java:276)
at javax.activation.MailcapCommandMap.<init>(MailcapCommandMap.java:128)
at javax.activation.CommandMap.getDefaultCommandMap(CommandMap.java:44)
at javax.activation.DataHandler.getCommandMap(DataHandler.java:136)
at javax.activation.DataHandler.getDataContentHandler(DataHandler.java:568)
at javax.activation.DataHandler.writeTo(DataHandler.java:294)
at javax.mail.internet.MimeUtility.getEncoding(MimeUtility.java:248)
at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1268)
at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:2012)
at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:1980)
at javax.mail.Transport.send(Transport.java:119)
at net.jforum.util.mail.Spammer.dispatchMessages(Spammer.java:192)
at net.jforum.util.mail.EmailSenderTask.run(EmailSenderTask.java:63)
at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:727)
at java.lang.Thread.run(Thread.java:595)

[originally posted on jforum.net by gumiyo]
 
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Which JForum version?

Rafael
[originally posted on jforum.net by Rafael Steil]
 
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2.1.8
[originally posted on jforum.net by gumiyo]
 
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