Hi,
The intention of the project is quite clear yet it lacks almost all the details. If you can share the requirements, or a spec. document if you have one, that'd really help a lot. It doesn't have to be a complete list including every detail, just enough to get started. If you don't want to bother with creating a specification from scratch you can simply create screenshots of outlook, or similar software, and mark the toolbars containing the features you want with rectangles. Recording a screencast is just another option if you instead prefer to explain things while displaying at the same time.
Anyway, since details are missing at this stage it's impossible to come up with any decent estimation hence my current proposal, both the bid and deadline, is just a placeholder, thanks for taking the time.