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Design HTML Email Design Designing Email with CSS Applying CSS to the Content Blocks

peichunliu
peichunliu
33,154 Points
Posted by peichunliu
peichunliu
33,154 Points

Does it necessary to add '=3D' in an html email ?

I understood It's an email encoding system called "quoted-printable" and an ASCII equal sign (decimal value 61) must be represented by "=3D", so does it really necessary? because I saw it in source code from many emails.