Recipient receives a winmail.dat attachment when sending email from Outlook with account

Last updated: June 29, 2017


When sending email to any contacts from your address book in Outlook, some recipients receive a winmail.dat file attachment that shows up in some clients such as Gmail and Yahoo web mail. In Outlook, the attachment icon is displayed but no attachment shown.

Outlook attachment icon


This issue is fixed in build 16.0.8229.2073. To install the fix, go to File > Office Account > Update Options > Update Now.

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