General discussion

Locked

email attachment

By lesmono ·
I use Netscape messenger 4.7 when someone send me email attachment I see this message:

"Part 1.2 Type: application/ms-tnef
Encoding: base64"

anyone know what does it mean?
thx in advance..

This conversation is currently closed to new comments.

5 total posts (Page 1 of 1)  
| Thread display: Collapse - | Expand +

All Comments

Collapse -

email attachment

by McKayTech In reply to email attachment

This is called the MIME header and is trying to describe the file type to your e-mail client so it knows how to handle it. The "Type: application/ms-tnef" means the attachment is an executable application with a type registered by Microsoft but I have no clue what the "tnef" subtype is as it doesn't appear on any of my lists of MIME types.

The "Encoding: Base64" describes the actual encoding method using an alphabet of 64 characters. On the plus side, it is compatible with the 7-bit word as well as EBCDIC legacy systems; on the downside, it has a 33% overhead meaning a 100k binary file becomes a 133k MIME-encoded file.

Theoretically, your e-mail client knows when it receives this file that it should use base64 decoding to recover the binary file from the attachment and that it can then run it with some Microsoft application.

paul

Collapse -

email attachment

by lesmono In reply to email attachment

The question was auto-closed by TechRepublic

Collapse -

email attachment

by Guru Kumar In reply to email attachment

Hi !

Below is some of the details fo the File Extension that you have asked for.

Mail programs in the Microsoft Exchange family, which includes Windows Messaging, Outlook97, Outlook98 and Outlook2000, will include a TNEF (Transport Neutral Encapsulation Format) attachment named WINMAIL.DAT when the sender selects, or defaults to, RTF (Rich Text Format). If the sender is using MIME formatting, this attachment will have Content-Type: application/ms-tnef.

The TNEF attachment includes aRich Text Format (e.g. bold, underline, fonts) version of the plain text message. If the sender has included any attachments (e.g. pictures, spreadsheets, programs), they will be embedded within the TNEF attachment and not as separate attachments.
Most other mail programs do not know how to handle the TNEF attachments and so Exchange family users should avoid using RTF unless they know that the recipient has a compatible program. The sender can control the use of RTF on a recipient by recipient basis. However, if sending via a Microsoft Exchange server, the server can override the sender's settings. In this case the Exchange administrator will need to make changes on the server. For more information on this, see the following articles:How Message Formats Affect Internet Mail, XCLN: Sending Messages In Rich-Text Format, XFOR: Preventing WINMAIL.DAT Sent to Internet Users, Sending RTF with Attachment as MIME Loses Attachment, XADM: POP3 Users may not Receive an Attachment if Part of DL and XFOR: CR Receives Rich Text Format Information Unexpectedly.

If this answers your Question then OK, otherwise you can contact me also.
If you are not able to open the file then If possible send to me, i will try to decode and then send it to you.

I am giving you the link below.You will find some details over here for the File Extension that you want.

Guru

Collapse -

email attachment

by lesmono In reply to email attachment

The question was auto-closed by TechRepublic

Collapse -

email attachment

by lesmono In reply to email attachment

This question was auto closed due to inactivity

Back to Software Forum
5 total posts (Page 1 of 1)  

Related Discussions

Related Forums