Often times when writing a message or more importantly, appyling for a job, one forgets to add an attachment despite having words like "Attached you can find..." in the message text, cover letter etc.
It would help if oDesk detected the presence of such keywords (attached, attaching, enclosed, etc.) and warned before sending if nothing is attached. Here's what Thunderbird does (see the picture):
P.S. Why .png isn't a valid attachment extension? It's not like the images would mostly be portraits or natural scenes - most would be screenshots and technical diagrams, for which .jpg is a poor choice.
Thanks for the suggestion. This isn't one I've seen often, but it does seem appropriate given the examples you provide. I'll share this feedback with our development team for their consideration.