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Anti-Spam: How to troubleshoot "Failed to unjunk emails" error message while unjunking emails f
03/26/2020 
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Description
Anti-Spam: How to troubleshoot "Failed to unjunk emails" error message while unjunking emails from Junk box View or Junk box summary
Resolution
Problem Definition:
While unjunking emails from Junk box view, we may get "Failed to unjunk emails" error message.
Resolution or Workaround:
There are many reasons the email will be failed to unjunk.This has to be identified in WebUI log. This log can be downloaded in Anti spam-Advanced page in firewall in CASS2.
If this issue is in CASS1, the WebUI log will be there in the server where the junk store application installed.
Location: C:Program FilesSonicWallESdatacommonlogswebUI
Step1: Unjunk the email from Junk box view/Junk summary, you will get an error "failed to unjunk" then download the WebUi log.(The file name should be the current date when the email was unjunked)
Step2: Search for recipient email address (The user who wants to receive this email).
Step3: You should see the error code.
Error code Example1:
EXCEPTION THROWN MessageStoreProcessor.doDeliver(): UNABLE to deliver [ 20110215_junkbox/store_20110215175553.mlx ] ... trying backup SMTP: javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.MessagingException: 552 5.3.4 Message size exceeds fixed maximum message size
TIP: (Mail server may reject emails due to size limit. So the customers should increase the size limit on their mail server)
Error code Example2:
EXCEPTION THROWN MessageStoreProcessor.doDeliver(): UNABLE to deliver [ 20110220_junkbox/store_20110220000548.mlx ] ... trying backup SMTP: javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.MessagingException: 550 5.7.1 Message rejected as spam by Content Filtering.
TIP: (Mail server may reject emails due to content filter settings on the Exchange mail server. Customer should disable content filter on their mail server in order to receive email from junk box)
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