All of a sudden my iPhone 4s began requesting a password for my email account, and I'd get this message: "The operation couldn't be completed. mfmessageerrordomain error 1032"
This fixed it:
Settings > Mail, Contacts, Calendar and delete your email account. Then tap Settings > Safari > and Tap Clear History and Clear Cookies and Data. Now tap Settings > Mail, Contacts, Calendar and re-enter your email account credentials.
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