smtp

package module

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Versions in this module

v0

v0.29.0

Sep 13, 2026

Changes in this version

type MailOptions

+ DeliverBy *DeliverByOptions

+ MTPriority *int

v0.28.3

Jul 25, 2026

v0.28.2

Jul 25, 2026

v0.28.1

Jul 25, 2026

v0.28.0

Jul 24, 2026

Changes in this version

+ func CloseConnection(err error) error

type Client

+ func (c *Client) CheckConn(timeout time.Duration) error

+ func (c *Client) Pipeline() (*Pipeliner, error)

+ type Pipeliner struct

+ func (p *Pipeliner) Mail(from string, opts *MailOptions) error

+ func (p *Pipeliner) Rcpt(to string, opts *RcptOptions) error

+ func (p *Pipeliner) Reset() error

+ func (p *Pipeliner) Wait() []error

v0.27.0

Jul 24, 2026

Changes in this version

type Conn

+ func (c *Conn) Context() context.Context

+ func (c *Conn) XClient() *XClientAttrs

+ type ConnState int

+ const StateClosed

+ const StateNew

+ func (c ConnState) String() string

+ type FeatureBackend interface

+ Features func(c *Conn) []string

type SMTPError

+ func Errorf(code int, enhancedCode EnhancedCode, format string, a ...interface{}) *SMTPError

type Server

+ ConnState func(net.Conn, ConnState)

+ EnableXCLIENT bool

+ TrustXCLIENT func(*Conn) bool

+ type XClientAttrs struct

+ Addr string

+ Helo string

+ Login string

+ Name string

+ Proto string

v0.26.3

Jul 24, 2026

v0.26.2

Jul 24, 2026

v0.26.1

Jul 24, 2026

v0.26.0

Jul 24, 2026

v0.25.0

Jul 24, 2026

Changes in this version

+ var EnhancedCodeNotSet = EnhancedCode

+ var ErrAuthFailed = &SMTPError

+ var ErrAuthRequired = &SMTPError

+ var ErrAuthUnknownMechanism = &SMTPError

+ var ErrAuthUnsupported = &SMTPError

+ var ErrDataReset = errors.New("smtp: message transmission aborted")

+ var ErrDataTooLarge = &SMTPError

+ var ErrServerClosed = errors.New("smtp: server already closed")

+ var ErrTooLongLine = errors.New("smtp: too long a line in input stream")

+ var NoEnhancedCode = EnhancedCode

+ func SendMail(addr string, a sasl.Client, from string, to []string, r io.Reader) error

+ func SendMailTLS(addr string, a sasl.Client, from string, to []string, r io.Reader) error

+ type AuthSession interface

+ Auth func(mech string) (sasl.Server, error)

+ AuthMechanisms func() []string

+ type Backend interface

+ NewSession func(c *Conn) (Session, error)

+ type BackendFunc func(c *Conn) (Session, error)

+ func (f BackendFunc) NewSession(c *Conn) (Session, error)

+ type BodyType string

+ const Body7Bit

+ const Body8BitMIME

+ const BodyBinaryMIME

+ type Client struct

+ CommandTimeout time.Duration

+ DebugWriter io.Writer

+ SubmissionTimeout time.Duration

+ func Dial(addr string) (*Client, error)

+ func DialStartTLS(addr string, tlsConfig *tls.Config) (*Client, error)

+ func DialTLS(addr string, tlsConfig *tls.Config) (*Client, error)

+ func NewClient(conn net.Conn) *Client

+ func NewClientLMTP(conn net.Conn) *Client

+ func NewClientStartTLS(conn net.Conn, tlsConfig *tls.Config) (*Client, error)

+ func (c *Client) Auth(a sasl.Client) error

+ func (c *Client) Close() error

+ func (c *Client) Data() (*DataCommand, error)

+ func (c *Client) Extension(ext string) (bool, string)

+ func (c *Client) Hello(localName string) error

+ func (c *Client) Mail(from string, opts *MailOptions) error

+ func (c *Client) MaxMessageSize() (size int, ok bool)

+ func (c *Client) Noop() error

+ func (c *Client) Quit() error

+ func (c *Client) Rcpt(to string, opts *RcptOptions) error

+ func (c *Client) Reset() error

+ func (c *Client) SendMail(from string, to []string, r io.Reader) error

+ func (c *Client) SupportsAuth(mech string) bool

+ func (c *Client) TLSConnectionState() (state tls.ConnectionState, ok bool)

+ func (c *Client) Verify(addr string) error

+ type Conn struct

+ func (c *Conn) Close() error

+ func (c *Conn) Conn() net.Conn

+ func (c *Conn) Hostname() string

+ func (c *Conn) Reject()

+ func (c *Conn) Server() *Server

+ func (c *Conn) Session() Session

+ func (c *Conn) TLSConnectionState() (state tls.ConnectionState, ok bool)

+ type DSNAddressType string

+ const DSNAddressTypeRFC822

+ const DSNAddressTypeUTF8

+ type DSNNotify string

+ const DSNNotifyDelayed

+ const DSNNotifyFailure

+ const DSNNotifyNever

+ const DSNNotifySuccess

+ type DSNReturn string

+ const DSNReturnFull

+ const DSNReturnHeaders

+ type DataCommand struct

+ func (cmd *DataCommand) Close() error

+ func (cmd *DataCommand) CloseWithLMTPResponse() (map[string]*DataResponse, error)

+ func (cmd *DataCommand) CloseWithResponse() (*DataResponse, error)

+ func (cmd *DataCommand) Write(b []byte) (int, error)

+ type DataResponse struct

+ StatusText string

+ type DeliverByMode string

+ const DeliverByNotify

+ const DeliverByReturn

+ type DeliverByOptions struct

+ Mode DeliverByMode

+ Time time.Duration

+ Trace bool

+ type EnhancedCode [3]int

+ type LMTPDataError map[string]*SMTPError

+ func (lmtpErr LMTPDataError) Error() string

+ func (lmtpErr LMTPDataError) Unwrap() []error

+ type LMTPSession interface

+ LMTPData func(r io.Reader, status StatusCollector) error

+ type Logger interface

+ Printf func(format string, v ...interface{})

+ Println func(v ...interface{})

+ type MailOptions struct

+ Auth *string

+ Body BodyType

+ EnvelopeID string

+ RequireTLS bool

+ Return DSNReturn

+ Size int64

+ UTF8 bool

+ type PriorityProfile string

+ const PriorityMIXER

+ const PriorityNSEP

+ const PrioritySTANAG4406

+ const PriorityUnspecified

+ type RcptOptions struct

+ DeliverBy *DeliverByOptions

+ MTPriority *int

+ Notify []DSNNotify

+ OriginalRecipient string

+ OriginalRecipientType DSNAddressType

+ RequireRecipientValidSince time.Time

+ type SMTPError struct

+ Code int

+ EnhancedCode EnhancedCode

+ Message string

+ func (err *SMTPError) Error() string

+ func (err *SMTPError) Temporary() bool

+ type Server struct

+ Addr string

+ AllowInsecureAuth bool

+ Backend Backend

+ Debug io.Writer

+ Domain string

+ EnableBINARYMIME bool

+ EnableDELIVERBY bool

+ EnableDSN bool

+ EnableMTPRIORITY bool

+ EnableREQUIRETLS bool

+ EnableRRVS bool

+ EnableSMTPUTF8 bool

+ ErrorLog Logger

+ ExtraCaps []string

+ LMTP bool

+ MaxLineLength int

+ MaxMessageBytes int64

+ MaxRecipients int

+ MinimumDeliverByTime time.Duration

+ MtPriorityProfile PriorityProfile

+ Network string

+ ReadTimeout time.Duration

+ TLSConfig *tls.Config

+ WriteTimeout time.Duration

+ func NewServer(be Backend) *Server

+ func (s *Server) Close() error

+ func (s *Server) ListenAndServe() error

+ func (s *Server) ListenAndServeTLS() error

+ func (s *Server) Serve(l net.Listener) error

+ func (s *Server) Shutdown(ctx context.Context) error

+ type Session interface

+ Data func(r io.Reader) error

+ Logout func() error

+ Mail func(from string, opts *MailOptions) error

+ Rcpt func(to string, opts *RcptOptions) error

+ Reset func()

+ type StatusCollector interface

+ SetStatus func(rcptTo string, err error)

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