I just repwned my iPhone 3g running 2.0.2 yesterday and my email app opens and then immediatly closes. This is completely annoying and if anyone knows how to fix this please help. I'm using windows and iTunes 7.7 and winpwn 2.5 thanks or your help.
make another custom firmware and restore to that one, the one you just made is borked.
Boss pref and in the "more" tab, pick "fix permission dir". Everything will work after that .
Download bossprefs from Cydia... open the program and go to the MORE tab... hit "fix user permissions" and then try your mail app again. Edit: ^^^^ beat me to it lol
thanks satch2501 that was the exact problem
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