GNU Emacs Manual - Rmail Rot13

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## Reading Rot13 Messages

Mailing list messages that might offend some readers are sometimes encoded in a simple code called rot13---so named because it rotates the alphabet by 13 letters. This code is not for secrecy, as it provides none; rather, it enables those who might be offended to avoid ever seeing the real text of the message.

To view a buffer using the rot13 code, use the command `M-x rot13-other-window`. This displays the current buffer in another window which applies the code when displaying the text.

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