Steps to Reproduce:

1. Create a Test Service Desk project and configure Outgoing Mail.
2. Logging as Customer that have a working email address into the Test Customer Portal.
3. Create a Request.
4. Log out and logging in as the Agent of the Test Service Desk project.
5. Attach a file and "Respond to Customer" while using the Attachment Text Formatting in the comment:

   [^JIRA61_db_schema.pdf]

6. Log out.
7. Wait until the notification is sent out and check the Customer Mailbox.
8. Click on the Attachment Hyperlink.

Expected Results:
Customer will be redirected to the Customer Portal before able to view the attachment.

Actual Result:
Customer will be redirected to JIRA which they do not have permission to access to.

Notes:

• This is the URL generated in the email from the attachment:

  http://10.60.4.135:6315/secure/attachment/10001/10001_JIRA61_db_schema.pdf

• where when clicking the URL is changing to:

  http://10.60.4.135:6315/login.jsp?permissionViolation=true&os_destination=%2Fsecure%2Fattachment%2F10001%2F10001_JIRA61_db_schema.pdf&page_caps=&user_role=