On Mon, Dec 6, 2010 at 8:42 PM, Michael Snoyman
The request is to make both the HTML and plain text parts use base64 encoding by default. This *seems* to me to make a lot of sense, since it will ensure that your message arrives exactly as you intended it, and will ensure that any non-ASCII code points don't get killed somewhere along the way. On the other hand, I'm not sure what client support is like for base-64 encoding. Don't we need to leave *some* form of non-encoded data for less sophisticated email clients?
The way I've seen it done before was to: - calculate the size of the body in quoted-printable and base64 encoding - select the smaller encoded form of the two quoted-printable is fairly human readable. This strategy also works for encoding headers, particularly Subject: lines (substituting q-encoding for qp). -n