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Answer 1

+8 A:

It's an email encoding system called "quoted-printable", which allows non-ASCII characters to be represented as ASCII for email transportation.

In quoted-printable, any non-standard email octets are represented as an = sign followed by two hex digits representing the octet's value. Of course, to represent a plain = in email, it needs to be represented using quoted-printable encoding too: 3D are the hex digits corresponding to ='s ASCII value (61).

Chris Jester-Young 2010-10-25 15:27:06

Yup. You should see `Content-Transfer-Encoding: quoted-printable` in the headers if QP is used.

Piskvor 2010-10-25 15:30:53

Interesting! Do I need to incorporate that into my email template, or will it be ok without it?

melee 2010-10-25 15:34:38

Jeeze. Why is email so frickin' complicated?

Stephen 2010-10-25 15:37:37

@melee: Don't write in QP by hand (i.e., your template should use `=`, not `=3D`). :-) If your email software needs to use QP, it'll convert automatically.

Chris Jester-Young 2010-10-25 15:48:04

Thanks Chris. I appreciate it!

melee 2010-10-25 15:48:34

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What's a 3D doing in this HTML?

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