Imports
- github.com/emersion/go-message/textproto
- golang.org/x/text/encoding
- golang.org/x/text/encoding/charmap
- golang.org/x/text/encoding/htmlindex
- golang.org/x/text/encoding/ianaindex
- golang.org/x/text/encoding/japanese
- golang.org/x/text/encoding/simplifiedchinese
- golang.org/x/text/encoding/traditionalchinese