Getting A Failed Mail Status On Workflow Notifications For Purchase Order Emails to Suppliers (Doc ID 1101820.1)

Symptoms

Find that in some cases, Purchase Order (PO) notifications to suppliers end up with MAIL_STATUS = FAILED in the WF_NOTIFICATIONS table. It is not known the exact pattern when these cases occur.

STEPS
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The issue can be reproduced at will with the following steps.  Note this does not happen for all suppliers, but for the suppliers that are having the issue it can be reproduced on command:

1. Create PO for a Supplier where this occurs
2. Supplier contact is not receiving the email notification (Web Supplier contact, via iSupplier Portal)

Cause

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