Attachments in any email constitute the actual message. Sometimes there are issues like yahoo mail attachments not working. If you cannot download attachments on Yahoo Mail, it may be due to the configuration or security settings of your Internet browser. If Internet Explorer is your web browser, you can fix the problem by disabling the plugin from the Tools menu. Other common reasons for the Yahoo mail attachment problem can be security issues. To resolve this, set the security settings to the correct values. The final reason can be anti-virus software, and a proxy firewall setting is Davao.