June 8, 2019
| posted as
Exchange Online, Mail Flow
One possible root cause of this is that you set the affected mailbox’s SMTP address as the “Journaling NDR” target. If affected mailbox has their SMTP address set here, then Inbox and Transport Rules will not be honored.
Change the NDR target to a dedicated mailbox or an external address
- Use the admin account to sign in to https://portal.office.com.
- On the global navigation bar, click Admin, and then click Exchange.
- Click Compliance Management, and then click Journal Rules. Review the value for the Send undeliverable journal reports to setting.
- Click Select address, and then click Browse to select a dedicated mailbox. Or, select an external contact to send these NDRs to.
- Click Save.