Link leading to attachment gives 404 Not Found error message
This could happen when you are using Mail-List.com's Clickable Attachments feature.
You or one of your subscribers reports that an attachment sent to your list is missing.
Why would this happen?
The link expired based on your account settings for Clickable Attachments. Unless you have changed the default setting, any attachments are deleted after 1 month.
Your options for deleting attachments are after 1 month, after 1 year or never.
To prevent this issue in this future, you can update your settings by following these step-by-step instructions.
Web Page Error
The link to access the attachment would look similar to this example: