Is it possible to get the device type/name from which an email was sent?

[eluser]bretticus[/eluser]
[quote author="codex" date="1253663874"]I'm wondering how some sites, for instance Flickr, 'know' from what device (iPhone, Blackberry) an email was sent. I don't see that information in an emailheader. So how do they know?

EDIT: Hmm, something tells me I have to take a look at EXIF data...[/quote]

I doubt there's EXIF data in the email itself, but they look at the email headers no doubt. Do you have access to the headers via SMTP transaction? What headers are you looking at?