Once the underlying cause of Email Delivery Suppression is determined and resolved, or if the cause is known to be an aberrant failure (e.g. hard bounce due to temporary communication issue), you can request Email Delivery remove the mail suppression by clicking Unsuppress on the Mail Suppression screen. Note that while this will remove the suppression, the removal may be temporary if the underlying cause is not resolved. Email Delivery may simply suppress the recipient address again. If this happens, Transportation and Global Trade Management needs to work with Oracle Cloud Email Operations to determine the cause.

Incorrect SPF configuration can often lead to Email Delivery suppression. It’s important to correctly configure your SPF with respect to your e-mail domains and any downstream servers. If using the APPLY SPF CHECKS TO OUTBOUND MAIL optional feature, these SPF checks can be viewed and reapplied from the Mail Sender screen. This allows you to fix all SPF issues before sending faulty requests through Email Delivery.

Email Delivery suppression may also be due to excessive mail use. See the Mail Quota section below for guidelines on monitoring your overall, per content and per recipient email use.