You are here: Runbox Help > Documentation > Webmail > Why do some of my messages have a “winmail.dat” file attached in addition to or instead of the normal attachment(s)?

Why do some of my messages have a “winmail.dat” file attached in addition to or instead of the normal attachment(s)?

This has to do with Microsoft Outlook and Exchange mail software, please see the following:

How to Prevent Winmail.dat Attachments from Being Sent in Outlook: www.lifewire.com/prevent-sending-winmail-dat-attachments-1173717

Filed Under: FAQs, Webmail

« What is Runbox’s limit on attachment sizes?

When I reply to a message, it doesn’t display (quote) the original message? »