There is already an yEnc encoding doing this. The problem is not that it’s impossible to do, but that it is non-standard and incompatible to other email clients such as K-9 Mail and Thunderbird.
There is already an yEnc encoding doing this. The problem is not that it’s impossible to do, but that it is non-standard and incompatible to other email clients such as K-9 Mail and Thunderbird.