diff --git a/pkg/config/settings.go b/pkg/config/settings.go
index b48cbcd1..e637f869 100644
--- a/pkg/config/settings.go
+++ b/pkg/config/settings.go
@@ -155,6 +155,20 @@ var keyValidators = map[string]configValidator{
 			"2.6-IV0",
 		)
 	},
+	"message.timestamp.after.max.ms": func(v string) bool {
+		intVal, err := strconv.ParseInt(v, 10, 64)
+		if err != nil {
+			return false
+		}
+		return intVal >= 0
+	},
+	"message.timestamp.before.max.ms": func(v string) bool {
+		intVal, err := strconv.ParseInt(v, 10, 64)
+		if err != nil {
+			return false
+		}
+		return intVal >= 0
+	},
 	"message.timestamp.difference.max.ms": func(v string) bool {
 		intVal, err := strconv.ParseInt(v, 10, 64)
 		if err != nil {
diff --git a/pkg/config/settings_test.go b/pkg/config/settings_test.go
index f9d48812..1c91d42a 100644
--- a/pkg/config/settings_test.go
+++ b/pkg/config/settings_test.go
@@ -72,6 +72,14 @@ func TestValidateSettings(t *testing.T) {
 			},
 			expError: true,
 		},
+		{
+			description: "message timestamp bounds",
+			settings: TopicSettings{
+				"message.timestamp.after.max.ms":  9223372036854775807,
+				"message.timestamp.before.max.ms": "86400000",
+			},
+			expError: false,
+		},
 		{
 			description: "non-matching string",
 			settings: TopicSettings{