attachments in outlook arrive as .dat files. how can I stop this?

[doUscuba]

when I send file attachments in outlook (.jpg, .doc, etc) they arrive as .dat
files, which recipients can't open. How can i stop this?
thanks

 

[Hal Hostetler [MVP P/I]]

Change your default message format from Rich Text Format (RTF) to either
HTML or Plain Text. Rich Text is only understood by Outlook. In general
RTF should NEVER be used for Internet mail because it screws up EVERY other
email client out there; they'll either get a WINMAIL.DAT file or get no
attachment at all:

http://support.microsoft.com/?kbid=287720
OL2002: Attachments Are Not Visible to Some Recipients When You Use TNEF
http://support.microsoft.com/?kbid=290809
OL2002: How Message Formats Affect Internet Mail
http://support.microsoft.com/?kbid=197064
OL2000: (CW) Winmail.dat Attachments Included in Received Messages
http://support.microsoft.com/?kbid=224817
OL2000: Transport Neutral Encapsulation Format (TNEF) Basics

Decoder programs to read a WINMAIL.DAT file are here:

http://www.slipstick.com/addins/decoders.htm
Decoder Tools

Hal
--
Hal Hostetler, CPBE -- (e-mail address removed)
Senior Engineer/MIS -- MS MVP-Print/Imaging -- WA7BGX
http://www.kvoa.com -- "When News breaks, we fix it!"
KVOA Television, Tucson, AZ. NBC Channel 4
Still Cadillacin' - www.badnewsbluesband.com