Attachments sent by mail will be sent to the recipient as 'winmail.dat'

Issue

In some cases it happens that sent e-mail attachments do not arrive in the intended file format (e.g. .pdf), but reach the recipient as 'winmail.dat'. It occurs when sending via the mail program Outlook.

Solution

Please configure your email preferences. Please pay particular attention to the settings for using the MAPI interface with Microsoft Outlook 2013.