jpeg file sent but received at winmail.dat

[mary]

When I send a jpeg file from my outlook it shows up in
some people's email as a winmail.dat file. If 5 people
are on the distribution list let's say 3 people can open
it but 2 can't. If I send the same file directly from my
email on the comcast web page then the file transmits
without any problems and can be opened by all. Is there a
setting in Outlook that is causing this to happen? What
can I do to fix the problem?

 

[Gordon]

When I send a jpeg file from my outlook it shows up in
some people's email as a winmail.dat file. If 5 people
are on the distribution list let's say 3 people can open
it but 2 can't. If I send the same file directly from my
email on the comcast web page then the file transmits
without any problems and can be opened by all. Is there a
setting in Outlook that is causing this to happen? What
can I do to fix the problem?

Are the ones who get the winmail.dat attachment non-Outlook users? If so,
then change your email format from RTF to either Plain Text or HTML