| bufio | Package bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O. |
| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/base64 | Package base64 implements base64 encoding as specified by RFC 4648. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/emersion/go-message/textproto | Package textproto implements low-level manipulation of MIME messages. |
| io | Package io provides basic interfaces to I/O primitives. |
| math | Package math provides basic constants and mathematical functions. |
| mime | Package mime implements parts of the MIME spec. |
| mime/quotedprintable | Package quotedprintable implements quoted-printable encoding as specified by RFC 2045. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |