https://en.wikipedia.org/wiki/Quoted-printable https://en.wikipedia.org/wiki/Quoted-printable Note that 0x3D is the "=" character in ASCII, so "=3D" in QP is "

https://en.wikipedia.org/wiki/Quoted-printable https://en.wikipedia.org/wiki/Quoted-printable Note that 0x3D is the "=" character in ASCII, so "=3D" in QP is "=" in ASCII. :) This email has probably been through a few conversions to QP and back again between different email clients. Perhaps some buggy client got confused between an ASCII "=" and a QP escape sequence or something like that.