---
article_id: KB0399001
article_type: Support Note
component_ids:
  - SBN-AN-TX-ADM-ORD
  - SBN-AN-TX-POA
component_descriptions:
  - SAP Business Network for Procurement & Supply Chain > Transaction Documents > Transaction (Purchase Orders, Ship Notices & Goods Receipts)
  - Transaction Documents > Transaction Document Administration > Transaction Document Administration Orders
products:
  - SAP Business Network for Procurement and SAP Business Network for Supply Chain
personas:
  - Supplier
language: en
created: 2026-03-17
updated: 2026-03-27
source: Knowledge Base
url: https://support.ariba.com/item/view/KB0399001
connect_url: https://support.ariba.com/item/view/KB0399001?min=1
sap_for_me_url: https://me.sap.com/notes/KB0399001
---

# Error: "PO-11: Cannot deliver order. Terminal error code for PO status: FE-28" purchase order failure

## Symptom

Purchase Order (PO) fails with the error message:

PO-11: Cannot deliver order. Terminal error code for PO status: FE-28

After this error, there may be another error message like the ones listed below:

Unrecognized email response received from the supplier.  
550 5.1.1 email@ariba,com: Recipient address rejected: User unknown in local recipient table  
550 5.4.1 Recipient address rejected: Access denied  
554 rejecting banned content  
552 size limit exceeded  
550 Too many invalid recipients  
550 5.7.0 Local Policy Violation  
5.2.2 STOREDRV.Deliver.Exception:QuotaExceededException

## Cause

The email configured under the **Electronic Order Routing** settings is rejecting the email from Ariba. This could be due to the email server/firewall settings, an inactive email, or an automatic reply.

Please note: If POs are failed only from one buyer, check any [**Override Routing**](https://support.ariba.com/item/view/134564) settings.

## Resolution

You can change the email settings on your account:

1. Login to your account at [https://supplier.ariba.com.](https://supplier.ariba.com.)
2. In the upper-right corner of the application, click **\[user initials\]** *>* **Company Settings** > **Electronic Order Routing**.
3. Edit the email address(s) on this page.  
   You can add up to 5 addresses for any notification. Separate emails with a comma and no space.
4. Click **Save**.

You can also look into your email server to see if the email address(s) is/are active, if any automatic reply is set up, or if any firewall settings are blocking the email.

Once the issue has been addressed with the email settings, you can [resend failed POs](https://support.ariba.com/item/view/150942).

## Keywords

Cannot deliver order, failed orders, Standard account PO failed, fe-28