package message // todo: we should parse headers ourselves // Link rfc updates about UTF-8 characters in messages. // These productions list valid characters in contexts: // VCHAR, visible printing: ../rfc/5234:774 ../rfc/6532:236 // ctext, in comment: ../rfc/5322:602 ../rfc/6532:238 // atext, in atom: ../rfc/5322:679 ../rfc/6532:240 // qtext, in quoted string: ../rfc/5322:735 ../rfc/6532:242 // text, in message body: ../rfc/5322:1001 ../rfc/6532:244 // dtext, in domain: ../rfc/5322:967 ../rfc/6532:247