This problems started some weeks a go, on a W7 64b client with outlook 2010 working in a SBS 2003 envirement sends pdf attachments to theire customers and some of them (not all) receive a winmail.dat file as attachmend. they are send do as a pdf attachment messages are made in HTML format. any idea's regards

Hello, How to Prevent the Winmail.dat File from Being Sent to Internet Users http://support.microsoft.com/kb/138053 Thanks, Simon

... and how to open winmail.dat files: http://www.winmail-dat.com Have fun, Bruno

H i Simon, unfortunatly this doesn't solved the problem, and its really an anoying somting more ideas? Regards pedro

Hi Bruno, thanks for the info I allready find this on the web, thanks any way, regards, pedro

This is how I eliminated the winmail.dat annoyance (it worked for me, maybe it will for you): In the "Remote Domain" tab at the Organization Level, I configured Rich Text to be used "never". http://www.corelan.be:8800/wp-content/uploads/2008/09/image22.png I also had users try text format for the messages with attachment (as opposed to either HTML or rich text). Second step may be overkill but at some point in the troubleshooting process it seemed to have a positive effect.Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

This is how I eliminated the winmail.dat annoyance (it worked for me, maybe it will for you): In the "Remote Domain" tab at the Organization Level, I configured Rich Text to be used "never". http://www.corelan.be:8800/wp-content/uploads/2008/09/image22.png I also had users try text format for the messages with attachment (as opposed to either HTML or rich text). Second step may be overkill but at some point in the troubleshooting process it seemed to have a positive effect.Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.