diff --git a/internal/pkg/core/notifier/providers/email/email_test.go b/internal/pkg/core/notifier/providers/email/email_test.go
new file mode 100644
index 00000000..1197a1a6
--- /dev/null
+++ b/internal/pkg/core/notifier/providers/email/email_test.go
@@ -0,0 +1,51 @@
+package email_test
+
+import (
+	"os"
+	"strconv"
+	"testing"
+
+	notifierEmail "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/email"
+)
+
+/*
+Shell command to run this test:
+
+	CERTIMATE_NOTIFIER_EMAIL_SMTPPORT=465 \
+	CERTIMATE_NOTIFIER_EMAIL_SMTPTLS=true \
+	CERTIMATE_NOTIFIER_EMAIL_SMTPHOST="smtp.example.com" \
+	CERTIMATE_NOTIFIER_EMAIL_USERNAME="your-username" \
+	CERTIMATE_NOTIFIER_EMAIL_PASSWORD="your-password" \
+	CERTIMATE_NOTIFIER_EMAIL_SENDERADDRESS="sender@example.com" \
+	CERTIMATE_NOTIFIER_EMAIL_RECEIVERADDRESS="receiver@example.com" \
+	go test -v -run TestNotify email_test.go
+*/
+func TestNotify(t *testing.T) {
+	smtpPort, err := strconv.ParseInt(os.Getenv("CERTIMATE_NOTIFIER_EMAIL_SMTPPORT"), 10, 32)
+	if err != nil {
+		t.Errorf("invalid envvar: %+v", err)
+		panic(err)
+	}
+
+	smtpTLS, err := strconv.ParseBool(os.Getenv("CERTIMATE_NOTIFIER_EMAIL_SMTPTLS"))
+	if err != nil {
+		t.Errorf("invalid envvar: %+v", err)
+		panic(err)
+	}
+
+	res, err := notifierEmail.New(&notifierEmail.EmailNotifierConfig{
+		SmtpHost:        os.Getenv("CERTIMATE_NOTIFIER_EMAIL_SMTPHOST"),
+		SmtpPort:        int32(smtpPort),
+		SmtpTLS:         smtpTLS,
+		Username:        os.Getenv("CERTIMATE_NOTIFIER_EMAIL_USERNAME"),
+		Password:        os.Getenv("CERTIMATE_NOTIFIER_EMAIL_PASSWORD"),
+		SenderAddress:   os.Getenv("CERTIMATE_NOTIFIER_EMAIL_SENDERADDRESS"),
+		ReceiverAddress: os.Getenv("CERTIMATE_NOTIFIER_EMAIL_RECEIVERADDRESS"),
+	})
+	if err != nil {
+		t.Errorf("invalid envvar: %+v", err)
+		panic(err)
+	}
+
+	t.Logf("notify result: %v", res)
+}
diff --git a/internal/pkg/utils/maps/maps.go b/internal/pkg/utils/maps/maps.go
index b475f09d..6f3c6fe6 100644
--- a/internal/pkg/utils/maps/maps.go
+++ b/internal/pkg/utils/maps/maps.go
@@ -154,10 +154,8 @@ func GetValueOrDefaultAsBool(dict map[string]any, key string, defaultValue bool)
 
 		// 兼容字符串类型的值
 		if str, ok := value.(string); ok {
-			if str == "true" || str == "True" || str == "1" {
-				return true
-			} else if str == "false" || str == "False" || str == "0" {
-				return false
+			if result, err := strconv.ParseBool(str); err == nil {
+				return result
 			}
 		}
 	}
diff --git a/ui/src/i18n/locales/en/nls.settings.json b/ui/src/i18n/locales/en/nls.settings.json
index b427a02a..580c4ef1 100644
--- a/ui/src/i18n/locales/en/nls.settings.json
+++ b/ui/src/i18n/locales/en/nls.settings.json
@@ -37,7 +37,7 @@
   "settings.notification.email.smtp_host.placeholder": "Please enter SMTP host",
   "settings.notification.email.smtp_port.label": "SMTP Port",
   "settings.notification.email.smtp_port.placeholder": "Please enter SMTP port",
-  "settings.notification.email.smtp_tls.label": "TLS/SSL connection",
+  "settings.notification.email.smtp_tls.label": "Use TLS/SSL",
   "settings.notification.email.username.label": "Username",
   "settings.notification.email.username.placeholder": "please enter username",
   "settings.notification.email.password.label": "Password",