Knowledge Article: How to ensure Oracle Purchasing Cloud emails are not rejected by the suppliers' e
Purchase order communication emails are rejected or treated as spam by your supplier's email system when the profile option "Purchase Order Email Sender" is not set to "Automatic".
If your company isn't currently using Sender Policy Framework (SPF) to protect your email servers and your domain name, it is strongly recommended that you do so. By using Sender Policy Framework (SPF) you can protect your domain from spoofing and ensure that your messages are delivered correctly. Not using SPF allows anyone to send emails as if they were coming from your company, and such forged emails could harm your corporate reputation.