High Volume of Bounce-Backs for “Confirm Your Identity” Emails in Oracle Recruiting Cloud (550 5.1.1
Summary:
We're receiving a large number of bounce-back emails for "Confirm your identity" messages sent from Oracle Recruiting Cloud. The bounce code is 550 5.1.1
, and these are not Alert Composer emails. Looking for advice on possible causes (e.g., SPF/DKIM issues) and how to resolve it.
Content (please ensure you mask any confidential information):
Hi everyone,
We’re seeing a high volume of bounce-back emails from system-generated “Confirm your identity” messages in Oracle Recruiting Cloud. The bounce messages are being returned to our shared mailbox and contain the following error:
550 5.1.1 <email>: Recipient address rejected: User unknown in virtual mailbox table