I use Outlook 2007 to send outgoing faxes via greenfax.com. I type in the recipient fax# in the "To:" box (i.e. "<recipient fax#>@greenfax.com").
A one-off email address such as this (i.e. it is not in my address book) seems to default to "Let Outlook decide the best sending format"; the default sending format is "HTML" (Tools, Options, Mail Format, Message format)
Recent emails I sent to greenfax to fax have ignored pdf attachments. According to greenfax customer service, it seems Outlook is converting the attachment to a winmail.dat file. But this was not the case months ago.
My question: how can I tell what format Outlook used to send an email? i.e. I want to examine an email I sent months ago which is stored in my "Sent Items" folder to know how Outlook formated the email.
I am using Outlook SMTP, not Exchange.