We’ve all seen mysterious .dat file attachments in our inboxes from time to time. In most cases the .dat attachment originates in Microsoft Outlook, which produces outgoing messages using a slightly ...

I was confused by your answer regarding winmail.dat. The file cannot be opened traditionally, at least to obtain what the receiver believes to be valuable contents. Rather, it’s used internally by ...

It’s been at least a year since I’ve received an email with a winmail.dat file as an attachment. Winmail.dat and MSG files are created when someone using Microsoft Outlook adds special formatting, ...