[raihanuddin]

if you open up the mail.app on the iphone and get a blank screen which reverts to the desktop about 20 seconds later

assuming you have installer.app - update it
install:
openbsd
community sources (if not already)
openssh

power down the iphone completely

download putty (windows) and start the iphone
connect the usb lead to your pc & iphone
connect to your wifi and note your ip address
open up putty and put the ip address in, click on open


you’ll have to wait around 30 seconds for the key to be generated, when it is and the certifcate prompt comes up say yes
login as: root


type in the password: its either dottie or alpine depending on which version of iphone you have


once you’re logged in (you’ll see the # prompt) type passwd and change it to “whatever you want your new
password to be”


retype your new password


type:

chown -R mobile:mobile /private/var/mobile


press return

turn off & power down and back up and you should be sorted

if u guys still having problem plz follow the links as belows

how to recover & repair from mail.app crash on an iphone « Mr L K’s Ibiza Blog

guys it woks for me,,,,,,,,

[satch2501]

Actually you can download boss prefs and pick "fix permission dir".

[duanertnanep]

It worked great without any hassle!
Bossprefs is the way to go!

[unlockme]

ya the one button bossprefs fix ftw!

[khayri]

My mail was working fine this morning, now it keeps crashing. Ive tried the Boss Prefs method and its still now working...Im now on a JB 3G 2.1 FW

any ideas?