special characters rails 3 ruby 1.8.7 -

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i using new rails 3 mail emails in app. when send email app email account subject:

(パンを食べない。) "i not eat bread"‏

my app have mail subject this:

<subject: =?iso-2022-jp?b?kbskqivrjxmkcj8pjfkksiqkismbkeip?= =?iso-2022-jp?b?icjjihdpbgwgbg==?= =?iso-2022-jp?b?b3qgzwf0igjyzq==?= =?iso-2022-jp?b?ywqi?=>

but mail.subject looks 

"(\e$b%q%s$r?)$y$j$$!#\e(b) \"i not eat bread\""

anyone know is, , how display correctly again in browser, , save correctly in database?


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