This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Why, since yesterday, am I receiving attachments as winmail.dat instead of Word when nothing has changed on my computer or the person's who is sending the e-mai

more options

Since yesterday lunchtime every attachment that a work colleague has sent me has appeared as winmail.dat instead of the Word format that she sent them in. She has not changed any settings on her computer and neither have I. In addition when I sent the e-mails back to her asking her to please send the attachments in Word format, the e-mail that she receives from me doesn't have any of the text that I had typed on it, but the file attachment shows in Word and not winmail.dat

Thanks and best wishes,

Frankie

Since yesterday lunchtime every attachment that a work colleague has sent me has appeared as winmail.dat instead of the Word format that she sent them in. She has not changed any settings on her computer and neither have I. In addition when I sent the e-mails back to her asking her to please send the attachments in Word format, the e-mail that she receives from me doesn't have any of the text that I had typed on it, but the file attachment shows in Word and not winmail.dat Thanks and best wishes, Frankie

All Replies (3)

more options

This is a known Microsoft creating their own standards problem. Take it up with the person sending mail from Outlook.

https://support.microsoft.com/en-us/kb/278061

more options

Chosen Solution

more options

Thank you for your help - problem sorted courtesy of sfhowes.