iPhone, iPad, or iPod touch does not display attachment in email
When receiving email messages with attachments (Word, Excel, or PDF files) represented by the paperclip icon, the attachment may not be displayed when the message is opened. Instead, a plain text version of the message is received and contains an attachment named Winmail.dat that cannot be viewed or opened.
This article has been archived and is no longer updated by Apple.
This happens when the email message is composed in RTF (Rich Text Format) with attachments. To display the attachment properly on an iPhone, iPad, or iPod touch, have the sender compose the email message in either plain text or HTML. For more information and for steps to configure Outlook to send Plain Text or HTML, see the following Microsoft KB document: How e-mail message formats affect Internet e-mail messages in Outlook.
Important: Mention of third-party websites and products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Apple assumes no responsibility with regard to the selection, performance or use of information or products found at third-party websites. Apple provides this only as a convenience to our users. Apple has not tested the information found on these sites and makes no representations regarding its accuracy or reliability. There are risks inherent in the use of any information or products found on the Internet, and Apple assumes no responsibility in this regard. Please understand that a third-party site is independent from Apple and that Apple has no control over the content on that website. Please contact the vendor for additional information.