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Error "Unable to Process Request" When Opening List Email Attachments in Salesforce Lightning Experience

Date de publication: May 31, 2026
Description

In Salesforce Lightning Experience, users may be unable to open file attachments that were sent using the Send a List Email feature. When attempting to open such attachments, users see the following error message:

Error: Unable to Process Request We couldn't access the content delivery. This content has been deleted, doesn't exist, or can't be previewed.

This error occurs because the Content Deliveries feature is not enabled for the organization or for users. List Email in Lightning Experience uses Content Deliveries to deliver file attachments. When Content Deliveries are disabled, the attachment links are inaccessible.

Résolution

A Salesforce administrator can resolve this issue by enabling the Content Deliveries and Public Links feature using the following steps:

  1. From Setup, enter content deliveries and public links in the Quick Find box.
  2. Select Content Deliveries and Public Links.
  3. Click Edit.
  4. Select both of the following options:
    1. Content Deliveries feature can be enabled for users
    2. Public Links can be enabled for users (requires Content Deliveries to be enabled first)
  5. Click Save.

After saving, users can open list email attachments in Lightning Experience without encountering the error.

Numéro d’article de la base de connaissances

000383769

 
Chargement
Salesforce Help | Article