Normal emails sent from Outlook desktop app is considered as bounced mail due to the blank return-path header value (<>)
Normal emails sent from Outlook desktop app is considered as bounced mail due to the blank return-path header value (<>)
Debug:
For bounced mail detection, internally we will be checking whether the return-path header value is blank or not. In addition to that, we'll be checking whether the error code '550 5.1.1 to 550 5.1.20' is present in the message content.
Doc Reference: https://docs.microsoft.com/en-gb/exchange/mail-flow-best-practices/non-delivery-reports-in-exchange-online/fix-error-code-550-5-1-1-through-5-1-20-in-exchange-online | https://support.google.com/a/answer/3726730
Reference Ticket:
Files Modified:
<SDP>\helpdesk\src\library\com\manageengine\servicedesk\mailutils\MailAPI.java
Jar Compatibility :
12004 SDP Build version
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