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Editorial Team
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Asked: 2026-05-15T20:00:57+00:00

It seems the header value is always encoded as ISO8859-1.

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It seems the header value is always encoded as “ISO8859-1”.

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  1. Editorial Team

    it is possible. read here: http://www.ietf.org/rfc/rfc2047.txt

    briefly. you write in header: =?UTF-8?B?0YTRi9Cy?=, where UTF-8 is encoding, B is for Base64 (may be Q for quoted-pritable), 0YTRi9Cy is actual encoded data (here some text in Russian)

    encoded-word = “=?” charset “?”
    encoding “?” encoded-text “?=”

    charset = token ; see section 3

    encoding = token ; see section 4

    token = 1*

    especials = “(” / “)” / “<” / “>” /
    “@” / “,” / “;” / “:” / ”
    <“> / “/” / “[” / “]” / “?” / “.” / “=”

    encoded-text = 1*
    ; (but see “Use of encoded-words in message
    ; headers”, section 5)

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