Attachments from Outlook are broken when download external content is not allowed on Outlook

Steps to Reproduce

1. Make sure to configure your Outlook to don't download the external content as stated on the doc that it follows: Block or unblock automatic picture downloads in email messages
2. Create a test ticket with a customer account
3. When you receive the customer notification, reply that email adding an Attachment

Expected Results

• Your attachment will be uploaded successfully.

Actual Results

• You will notice that besides your actual attachment, a blank image it will be appended as well on the ticket named:
  • image001.jpg
  • Or the attachment can be shown by the URL of the image with an exclamation mark at the beginning.
• In case you are replying over a thread email which has previous attachments, that it will break the access to those files as well.