| TABLE 1: Registry Values to Implement SMTP Connector Restrictions |
| Value |
Setting |
| CheckConnectorRestrictions |
Set to 1 to enable checks. |
| IgnoreRestrictionforNullDSN |
Set to 1 to ignore restrictions for Delivery Status Notifications (DSNs—such as nondelivery messages). If set to 0, a restricted connector will block DSNs. |