mail format issues winmail.dat

[Anne]

I just got my iphone and Apple acknowledges problems with attachments sent
from Outlook. I emailed my clients to make sure that the mail format options,
are set to HTML and to double click my email address in contacts to change it
to: Let Outlook decide. It works.

However, I have 7 email addresses and sometimes I use an email which is not
in my client’s address book. I they use reply, and I double click my email
address in their reply, it shows up as rich mail format, which now explains
to me why these emails show up as winmail.dat in the iphone. Even if I open
these email using yahoo mail (which handles the emails for all AT&T products)
the attachments show up as winmail.dat.
Is there a solution?

Why is Outlook sending this email as rich text format is the default on the
client computer is set to HTML as default?

 

[Orland, Kathleen]

The client software may be set to send HTML but the preference set for the
individual contact may override it.

 

[Anne]

The issue is, that if I am not in this persons address book, but they reply
to one of my emails, they cannot set a default.

 

[Anne]

I think I found the answer to the problem. Before winmail.dat became a
problem, some of my own email addresses were set up as rich text format. When
email was sent, in the recipient's outlook, that email address is held in
memory and when the recipient uses that memorized email address to reply, it
defaults to rich text format again. I found in a write up that outlook never
changes the format in which the email was received.
The answer is to delete the memorized emails (I need to find again where to
do this) or add the additional emails to the address book, so that the
default can be changed permanently.