fix: fix starttls-option-key not exist

model/property/base.go

@@ -53,6 +53,7 @@ var AllProperty = []Property{
 	EmailPassword,
 	EmailFromName,
 	EmailIsEnabled,
+	EmailStarttls,
 	CustomHead,
 	CustomContentHead,
 	StatisticsCode,

model/property/email.go

@@ -38,4 +38,9 @@ var (
 		DefaultValue: false,
 		Kind:         reflect.Bool,
 	}
+	EmailStarttls = Property{
+		KeyValue:     "email_starttls",
+		DefaultValue: false,
+		Kind:         reflect.Bool,
+	}
 )