Yesterday I was added as a user to a client's Exchange server. I configured Outlook 2007, set up a signature and sent a test email to my address outside of their domain. It was sent in plain text. Checked my web mail just to be sure it was not an Outlook setting. It was plain text there as well.
Then I sent the same message to my new address. It was delivered in HTML.
I tested through Outlook Web Access as well as with another email address outside of their domain. Same results.
It appears that emails sent from this account to external domains (at least the 2 I tested with) are converted to plain text.
My client is at a loss to explain this. Emails sent from his account work just fine. I have received many with embedded screen shots, etc.
He can't find any settings that would override the mail format for a single mailbox.
There must be something different about my account. Any ideas?