| crypto/tls | Package tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446. |
| 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-imap | Package imap implements IMAP4rev1 (RFC 3501). |
| github.com/emersion/go-imap/backend | Package backend defines an IMAP server backend interface. |
| github.com/emersion/go-imap/commands | Package commands implements IMAP commands defined in RFC 3501. |
| github.com/emersion/go-imap/responses | IMAP responses defined in RFC 3501. |
| github.com/emersion/go-sasl | Library for Simple Authentication and Security Layer (SASL) defined in RFC 4422. |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| runtime/debug | Package debug contains facilities for programs to debug themselves while they are running. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |