Having received the next letter by e-mail, any user may face the situation when some information in this letter is missing and in the same time there is winmail.dat is in the list of files. This file can be downloaded to your computer without problems, but you will not be able to open it with standard tools. At the same time, a winmail.dat may contain a very important information, because, in fact, this file can be called a data archive of some kind. In this article we will find out why winmail.dat may appear in the list of files and what is the best way to open it.
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- Another option for Windows users (besides purchasing Microsoft Outlook) is to download a viewer program like MessageViewer Lite by Encryptomatic LLC. MessageViewer Lite can display the contents an formatting of the winmail.dat file. MessageViewer Lite is us$24.95. A free 15 day trial is available.
- How many times have you come across pesky and puzzling, impossible to open ‘winmail.dat or ATT0001.dat’ files attached to your email? This handy, free online tool saves you from frustration, giving you easy access to their contents. It’s quick and simple to use, with no hidden costs, registration or email required.
- After extracting the content you can open it with an external viewer, save the contained attachments to a location of your choice or share the attachments via email. The free version is ad-supported. With an in-app purchase, you can upgrade to the ad-free Pro version. Kindly note that not every file ending with '.dat' is a winmail.dat (TNEF) file.
Winmail.dat in the letter: what is this file
If the sender sends his message using Microsoft Outlook, Express or Exchange (or other less common third-party programs), some of the information in it can be sent in an attachment named winmail.dat. Also on the Internet you may meet another name for this file – it can be called TNEF, which is the abbreviation for Transport Neutral Encapsulation Format.
This winmail.dat file mainly appears because when the sender was using his application to send the message, he applied formatting that is not supported by the program (for example, the browser) that will be used by recipient to view this message. At the same time, the letter from the sender left in the RTF format. As a result, the recipient will find only some text and attached supported materials from the sent message, but the formatting elements (font, color), vcf contact cards, icl calendar events and some other elements will be placed in a file named winmail.dat.
How to open the winmail.dat file
Having received the winmail.dat file in the letter, any user can open it, if necessary, even without having an Outlook e-mail client (or anything like it, supporting operations with this file) on his computer. It is possible to use online services or special small utilities to view information in the winmail.dat file.
Using online services
There are many online services that will allow you to easily extract information from the winmail.dat file. One of the proven and convenient services is Winmaildat.com. It’s interface is not overloaded with unnecessary features, you can work with it for free, and it copes with it’s main task – opening the winmail.dat file – without any problems. This service operates as follows:
- First you need to download the winmail.dat file from the letter that you received;
- Next go to the Winmaildat.com website and click “Choose a file”. In the window that opens, specify the path to the winmail.dat file downloaded on your computer;
- When the file is downloaded, click “Start” and wait. Waiting time depends on the file size and connection speed;
- After a while the page will be updated, and you can download all necessary files to your computer. It is worth noting that the online service in question does not work with files that weigh more than 10 MB.
Winmail Dat Viewer Programs
Using utilities
There are several programs to view winmail.dat files, created for various operating systems, including mobile ones:
- Windows. If you have a permanent need to open winmail.dat files, it is advisable to install a special application that performs this function on your computer, instead of using the online service. The program called Winmail Reader handles the task of viewing the winmail.dat files without any troubles. You can download it for free from the official website. It is worth noting that, unlike the online service mentioned above, this program can work with files larger than 10 MB;
- MacOS. Mac App Store has a Winmail.dat Viewer application. It is called Letter Opener 4 and it also serves to open winmail.dat files. This program is extremely simple and free. It has a very convenient content preview function;
- iOS and Android. You can also easily find programs for mobile operating systems that will allow you to open winline.dat files. Winmail.dat Opener is an extremely simple and convenient application for Android, and at iOS-devices you can use Winmail DAT File Viewer.
It is not recommended to download winmail.dat files, that cause suspicion and are executable, that is, they have the format .exe, .cmd and others.
Why Winmail.dat Viewer
Winmail.dat Opener is obtainable 100% free of cost which is an easy way to open Winmail.dat TNEF (Transport Neutral Encapsulation Format) files of MS Exchange Server, Outlook, OE Outlook Express, Thunderbird, Zix Mail, Google Mail, Zoho Mail, etc. Microsoft Outlook editions automatically create Winmail.dat files if Outlook users send email message using the RTF (Rich Text Format) or HTML (Hypertext Markup Language). In Winmail.dat file original email message information i.e. To, Cc, Bcc, From, Subject, Signature, Attachments, etc. is packed in single Winmail.dat file. If MS Outlook users use RTF and HTML format during sending their email messages then sometimes end users receive emails and attachments in Winmail.dat files. It is an exquisite program to read winmail.dat files.
Forensics Investigation
Winmail.dat file reader is a perfect software for forensic investigation because it can be directly run from pen drive or hard drive without installation. Forensic investigators don’t want to install any software on affected machine and it is best for them because it does not require installation as it is portable software. It is an excellent software for forensic investigators.
Attachment Evidences
As we all know, in Winmail.dat TNEF file Email Message, Sender Email Address, Receiver Email Address, HTML Links, Subject, Signature, Header, Footer, Attachments, etc. is packed in separate file. Attachments are the most important part of any Winmail.dat file and this Winmail.dat file reader permits to open winmail.dat attachments and save them at the desired destination path.
Advanced Search Option
Winmail Dat Viewer Pro License
The advanced search functionality of BitRecover Winmail.dat TNEF File Viewer comes with multiple filters so that users can easily find out the relevant information within Winmail.dat files. Free winmail.dat file opener has To, From, Subject, Receive Date, Receive Before, Receive After, HAS Attachments, etc. filters for searching the specific information within Winmail DAT TNEF files.
Counts Folder Messages
Winmail Dat Viewer Program
When users choose a whole folders having unlimited winmail.dat files then this application automatically start the counting of email messages. After complete the counting procedure, free Winmail.dat viewer shows the total number of counted emails in the software interface. This functional is beneficial if someone wants to know how many TNEX files available in the whole folder.