First, are you able to save the attachments, and then can you open
that saved document by double-clicking on it? If the saved attachment
does not open outside of Windows Mail, then you need to make sure
you have the correct program installed for that file type.
If saved attachments do open correctly outside of Windows Mail,
but can't be opened inside of Windows Mail, make a note of which
file type you have that problem with, .DOC, .XLS, .PPS, etc.
Let us know, so we can provide you with the correct fixes.

Signature
Gary VanderMolen, MS-MVP (WLMail)
> Hello, does anyone know if there is a way to set it up so that attachments in
> Windows ail will open every time? I always have to go in and choose what
> program I want it to open with and I don't always know. I never had this
> problem with Outlook?
> Thanx everyone
Leslie - 06 May 2008 03:05 GMT
Thank you. I wil keep track of ones that don't open and get back to you. I
tried to save the last One I received, and was able to. It did not open by
double clicking, I had to choose the program to open it in? thank you, I
will save this and reply back when I have some info on the ones that don't
open?
Thank you

Signature
Leslie
> First, are you able to save the attachments, and then can you open
> that saved document by double-clicking on it? If the saved attachment
[quoted text clipped - 10 lines]
> > problem with Outlook?
> > Thanx everyone
Gary VanderMolen - 06 May 2008 06:02 GMT
Once you choose the program to open a given file type, it should
open automatically next time.

Signature
Gary VanderMolen, MS-MVP (WLMail)
> Thank you. I wil keep track of ones that don't open and get back to you. I
> tried to save the last One I received, and was able to. It did not open by
[quoted text clipped - 18 lines]
>> > problem with Outlook?
>> > Thanx everyone
Leslie - 16 May 2008 02:31 GMT
OK, I just received an email with an attachment that says the type is a DAT
file? I've also had trouble opening powerpoint attachments. Awhile back,
after searchign for over an hour, I was able to find some info that helped me
open it, but then the next one I received wouldn't open again.
Thank you for your help

Signature
Leslie
> Once you choose the program to open a given file type, it should
> open automatically next time.
[quoted text clipped - 21 lines]
> >> > problem with Outlook?
> >> > Thanx everyone
robertmiles@bellsouthNOSPAM.net - 16 May 2008 03:09 GMT
Was its filename winmail.dat? If so, it's probably in the Outlook RTF
format, which only Outlook can open.
For the Powerpoint attachments, see if this helps:
<http://www.winhelponline.com/articles/149/1/Unable-to-open-PPS-attachments-direc
tly-from-Windows-Mail-in-Windows-Vista.html>
> OK, I just received an email with an attachment that says the type is a
> DAT
[quoted text clipped - 36 lines]
>> >> > problem with Outlook?
>> >> > Thanx everyone
Leslie - 16 May 2008 03:17 GMT
it just says:
Name: Header.dat
Type: DAT File
????

Signature
Leslie
> Was its filename winmail.dat? If so, it's probably in the Outlook RTF
> format, which only Outlook can open.
[quoted text clipped - 43 lines]
> >> >> > problem with Outlook?
> >> >> > Thanx everyone
robertmiles@bellsouthNOSPAM.net - 16 May 2008 07:20 GMT
Then you'll have to ask the sender what program is needed to open
that attachment.
> it just says:
> Name: Header.dat
[quoted text clipped - 55 lines]
>> >> >> > problem with Outlook?
>> >> >> > Thanx everyone
Gary VanderMolen - 16 May 2008 06:29 GMT
Windows Mail cannot open .DAT attachments.
Have you asked the sender what that attachment is supposed to be?
If the sender is using Microsoft Outlook, have him resend using plain text.

Signature
Gary VanderMolen, MS-MVP
> OK, I just received an email with an attachment that says the type is a
> DAT
[quoted text clipped - 36 lines]
>> >> > problem with Outlook?
>> >> > Thanx everyone