I have been facing the same problem before but then I was able to solve it by deleting and then adding the mail account again and then the problem was solved I don’t know if it is a perfect solution for it but then I was able to solve it by the same method and in order to do so just Go in to the Setting and then go in to the 'Mail, Contacts, Calendars' and then click on the account and then in the account settings just go to the bottom and then delete the account either delete it one at a time or delete all the accounts at once. I will also like to inform you that of you have an iCloud account then you can get a choice to merge as well while you add the account and if you want to sync via iTunes then you can try out that as well and it is better to keep a fresh backup or the current backup of all the information in your phone and after adding your account you should not face the crashing problem again. Just check it out and then let me know if it works then well and good and if no then I will try to help you with other solutions but first try this out.
Bookmarks