Function sendSMTPEmail

email.go:68–133

(to, cc, bcc []string, from, subject, body string, attachments []string)

)

func sendSMTPEmail(to, cc, bcc []string, from, subject, body string, attachments []string) error {
	server := mail.NewSMTPClient()

	var err error
	server.Username = smtpUsername
	server.Password = smtpPassword
	server.Host = smtpHost
	server.Port = smtpPort

	// Set defaults for gmail.
	if strings.HasSuffix(server.Username, gmailSuffix) {
		if server.Port == 0 {
			server.Port = gmailSMTPPort
		}
		if server.Host == "" {
			server.Host = gmailSMTPHost
		}
	}

	switch strings.ToLower(smtpEncryption) {
	case "ssl":
		server.Encryption = mail.EncryptionSSLTLS
	case "none":
		server.Encryption = mail.EncryptionNone
	default:
		server.Encryption = mail.EncryptionSTARTTLS
	}

	server.KeepAlive = false
	server.ConnectTimeout = 10 * time.Second
	server.SendTimeout = 10 * time.Second
	server.TLSConfig = &tls.Config{
		InsecureSkipVerify: smtpInsecureSkipVerify, //nolint:gosec
		ServerName:         server.Host,
	}

	smtpClient, err := server.Connect()
	if err != nil {
		return fmt.Errorf("connecting to SMTP server: %w", err)
	}

	email := mail.NewMSG()
	email.SetFrom(from).
		AddTo(to...).
		AddCc(cc...).
		AddBcc(bcc...).
		SetSubject(subject)

	html := bytes.NewBufferString("")
	convertErr := goldmark.Convert([]byte(body), html)

	if convertErr != nil {
		email.SetBody(mail.TextPlain, body)
	} else {
		email.SetBody(mail.TextHTML, html.String())
	}

	for _, a := range attachments {