Anyone does have any idea why the following is being encountered during the email authentication process? We are using PeopleSoft application and we have notification functionality which will send a notification email to the users but email not being sent due to an invalid email address but actually the email is active and valid. Below are the logs from SMTP
DEBUG SMTP: Sending failed because of invalid destination addresses
Wed Jul 31 09:38:14 GMT+08:00 2013 RSET
Wed Jul 31 09:38:14 GMT+08:00 2013 250 2.0.0 Resetting
Wed Jul 31 09:38:20 GMT+08:00 2013 javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
class com.sun.mail.smtp.SMTPAddressFailedException: 550 5.1.1 User unknown
Wed Jul 31 09:38:20 GMT+08:00 2013 at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1141)
Wed Jul 31 09:38:20 GMT+08:00 2013 at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:536)
Wed Jul 31 09:38:20 GMT+08:00 2013 at com.peoplesoft.pt.mcf.mail.MCFOutboundEmail.send(MCFOutboundEmail.java:686)
Wed Jul 31 09:38:20 GMT+08:00 2013 at com.peoplesoft.pt.mcf.mail.MCFOutboundEmail.send(MCFOutboundEmail.java:854)
Kindly let us know your thoughts on this.
That's probably a question for your server administrator.
Look at the details of the exception and/or turn on JavaMail Session debugging to see exactly what email address the server is complaining about. And of course make sure you're really authenticating to the server; if you don't authenticate it may limit the addresses you're allowed to send to (although I would expect a different error message).