Ptt 大爆卦 | B emoji - 前往 https://stackoverflow.com/questions/73070580/how-the-emoji-in-email-subject-line-is-decoded-to-this-utf-8b4pyf

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並前往https://stackoverflow.com/questions/73070580/how-the-emoji-in-email-subject-line-is-decoded-to-this-utf-8b4pyf

how the ✓ emoji in email subject line is decoded to this? =?utf ...

charset is utf-8 , encoding is B (per spec Base64 encoding), and encoded-text is 4pyF . With Python we can generate and verify this:

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