126 lines
2.5 KiB
Go
126 lines
2.5 KiB
Go
package main
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import (
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"crypto/tls"
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"fmt"
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"log"
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"net/smtp"
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"os"
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"time"
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)
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const (
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smtpServer = "smtp.exmail.qq.com"
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smtpPort = 465
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maxRetries = 3
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)
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func main() {
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log.Println("Service Cli Mode Start ...")
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log.Println("Done!")
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err := sendEmail(
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os.Getenv("BSM_SMTP_TO"),
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"Go邮件测试",
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"这是一封通过Go语言发送的测试邮件",
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)
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if err != nil {
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fmt.Printf("发送失败: %v\n", err)
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} else {
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fmt.Println("邮件发送成功")
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}
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}
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func sendEmail(to, subject, body string) error {
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smtpUser := os.Getenv("BSM_SMTP_USER")
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smtpPassword := os.Getenv("BSM_SMTP_PASSWORD")
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if smtpUser == "" || smtpPassword == "" || to == "" {
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return fmt.Errorf("BSM_SMTP_USER, BSM_SMTP_PASSWORD and BSM_SMTP_TO are required")
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}
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// 配置SMTP认证信息（需使用授权码）
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auth := smtp.PlainAuth(
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"",
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smtpUser,
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smtpPassword,
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smtpServer,
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)
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// 邮件内容构建（符合RFC822标准）
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msg := fmt.Sprintf("To: %s\r\n"+
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"From: %s\r\n"+
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"Subject: %s\r\n"+
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"Content-Type: text/plain; charset=UTF-8\r\n\r\n"+
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"%s",
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to,
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smtpUser,
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subject,
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body,
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)
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// 建立TLS连接
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tlsConfig := &tls.Config{
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ServerName: smtpServer,
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InsecureSkipVerify: false,
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MinVersion: tls.VersionTLS12,
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}
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var lastErr error
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for i := 0; i < maxRetries; i++ {
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conn, err := tls.Dial("tcp", fmt.Sprintf("%s:%d", smtpServer, smtpPort), tlsConfig)
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if err != nil {
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lastErr = fmt.Errorf("TLS连接失败: %v", err)
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time.Sleep(2 * time.Second)
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continue
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}
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client, err := smtp.NewClient(conn, smtpServer)
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if err != nil {
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conn.Close()
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lastErr = fmt.Errorf("SMTP客户端创建失败: %v", err)
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continue
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}
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if err := client.Auth(auth); err != nil {
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client.Close()
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lastErr = fmt.Errorf("认证失败: %v", err)
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continue
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}
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if err := client.Mail("yanweidong@senlinai.com"); err != nil {
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client.Close()
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lastErr = fmt.Errorf("MAIL命令失败: %v", err)
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continue
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}
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if err := client.Rcpt(to); err != nil {
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client.Close()
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lastErr = fmt.Errorf("RCPT命令失败: %v", err)
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continue
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}
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w, err := client.Data()
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if err != nil {
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client.Close()
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lastErr = fmt.Errorf("DATA命令失败: %v", err)
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continue
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}
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if _, err := w.Write([]byte(msg)); err != nil {
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client.Close()
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lastErr = fmt.Errorf("写入邮件内容失败: %v", err)
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continue
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}
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if err := w.Close(); err != nil {
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client.Close()
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lastErr = fmt.Errorf("关闭数据流失败: %v", err)
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continue
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}
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client.Quit()
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return nil
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}
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return lastErr
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}
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