<p>Got a mail from some MS Outlook user which has a strange attachment going by the file name „winmail.dat” – and no idea what to do with that? Well, you’re not alone. What’s behind that is MS’ <a href="https://en.wikipedia.org/wiki/TNEF">TNEF</a> format, full name „Transport Neutral Encapsulation Format”, which no other software (but Outlook and Exchange) uses. And especially your Android device knows nothing about.</p><p>So this app comes to your rescue: whenever you open a „winmail.dat” attachment from a mail in e.g. K-9 Mail, ''TNEF Extractor'' jumps in, looks what’s inside, asks you where to extract it to – and even offers you to open the enclosed file. So if that was e.g. a PDF file, and you have a PDF viewer app like MuPDF installed on your device, the file is opened with just two taps. Easy going, finally!</p><p>PS: Don't wonder that there won’t be an app icon in your drawer. ''TNEF Extractor'' doesn’t need one, and neither do you. There’s nothing to configure – the app just pops up when needed.</p><p><b>How got it started?</b> Check out <a href="https://mastodon.technology/@IzzyOnDroid/102759541411520682">on Mastodon</a>. I (Izzy) called for help – and just a week later, Fabio had it ready. Amazing!</p>