New (client/smtp.go)

Module exposing: New, Do, smtpAuth, dial, newTLSConfig, Client

// Source: https://github.com/SigNoz/signoz | License: MIT | Copyright 2020-present SigNoz Inc
// Provided via justclaw.it.com; keep this notice with the code.
package client

import (
	"bytes"
	"context"
	"crypto/tls"
	"crypto/x509"
	"fmt"
	"log/slog"
	"math/rand"
	"mime"
	"mime/multipart"
	"mime/quotedprintable"
	"net"
	"net/mail"
	"net/smtp"
	"net/textproto"
	"os"
	"strings"
	"sync"
	"time"

	"github.com/SigNoz/signoz/pkg/errors"
)

type Client struct {
	logger    *slog.Logger
	address   string
	host      string
	port      string
	from      *mail.Address
	headers   map[string]string
	hello     string
	auth      Auth
	tls       TLS
	tlsConfig *tls.Config
}

func New(address string, logger *slog.Logger, opts ...Option) (*Client, error) {
	clientOpts := options{
		from:    "signoz@signoz.l

... (truncated -- full source via MCP)