- First, check the rules applied to your Out of Office (OOO) message. It may be that rules have been applied that causes OOO messages to be sent to all recipients.
- Second, make sure your OOO settings are configured to only send messages to those within your organization, or to those you specify.
- Third, double-check and confirm the timing of OOO message activation.
- Fourth, confirm that OOO is not enabled in the e-mail client (which overrides server settings).