After a fresh install of Version 4:4.5~20100820.1165966-1maemo1.1167016 , KMail Mobile offers "Write new Mail", although I have not yet created an account ("Identity"). The "selected" account in the "New mail" dialog appears as "Unknown". Possible solutions: - Disable the button when none account yet specified. - Notify that the identity lacks information when attempting to send the mail. - Force identity definition on initial startup.
It seemed to me that an account wizard popped up after closing kmail via "Quit" in flap. It might however also just have taken so long to start it in the first place.