Editing Outlook Express (section)

===Email standards===
Beginning with the text-based [[Mail (Unix)|Unix Mail command]], email traditionally used the inline or bottom [[posting styles]] when replying to messages. Outlook Express, as well as [[Lotus Notes]] and Microsoft Outlook, top-post (show replies newest to oldest) by default.

Microsoft Outlook and Microsoft Exchange use a [[proprietary software|proprietary]] email attachment format called [[Transport Neutral Encapsulation Format]] (TNEF) to handle formatting and other features specific to Outlook such as meeting requests. Outlook Express and other email clients are unable to read this format.<ref>{{cite web|url=http://support.microsoft.com/kb/290809/ |title=How email message formats affect Internet email messages in Outlook |website=Support |publisher=[[Microsoft]] |date=October 1, 2004 |access-date=December 17, 2012 |url-status=live |archive-url=https://web.archive.org/web/20041019105215/http://support.microsoft.com/kb/290809 |archive-date=October 19, 2004}}</ref> This can be confusing to Outlook Express users (as well as those who use other email clients) who receive attachments sent from Outlook.