Hi @htuc! I’m sorry, but at the moment Mail Drop doesn’t support setting a project or due date directly in the email.
Mail Drop was conceived as a way of supporting capture – just getting things into OmniFocus. Later, when you process them out of your Inbox, you have a chance to set all the different metadata that supports your workflow.
When sending tasks via Mail Drop from the OS X Mail app I typically use Redirect instead of Forward. This way you won’t have the “Fwd” in the subject line or “Begin forwarded message:” in the notes field.
To redirect a message either choose Message > Redirect or press ⌘ + ⇧ + E. For convenience, you can also add the Redirect command to the toolbar using View > Customize Toolbar. I place it right beside the Forward button.
As Tim from Omni mentioned, there isn’t currently a way to schedule a task and assign a project using Mail Drop, though this would be a welcome feature that would open up some new workflows.
Is this feature still in the works? Would be really nice if we could schedule tasks using mail drop. Should be fairly to simple to just have a tag in the subject and correspond that to different times. Would make for some crazy good workflows using IFTT etc.