Quoted-printable is an encoding method that uses 7-bit printable ASCII characters. Used to transfer 8-bit data in a 7-bit data path in email.
Quoted-printable represents 8-bit data in 2-digit hexadecimal format, such as =XX. For example, "あ" in UTF-8 becomes "=E3=81=82". 7-bit printable characters such as "A" are not converted.
Email MIME message header type (RFC 2047)
DenCode also supports decoding of MIME message header format (RFC 2047), such as below. This format is used when the subject, recipient, etc. of the email contains non-ASCII characters.
The result after decoding is as follows.