diff --git a/src/main/java/com/sanctionco/jmail/JMail.java b/src/main/java/com/sanctionco/jmail/JMail.java
index ce58df4..28e5658 100644
--- a/src/main/java/com/sanctionco/jmail/JMail.java
+++ b/src/main/java/com/sanctionco/jmail/JMail.java
@@ -513,7 +513,7 @@ private static boolean isValidIdn(String test) {
 
     try {
       domain = IDN.toASCII(test, IDN.ALLOW_UNASSIGNED);
-    } catch (Exception e) {
+    } catch (IllegalArgumentException e) {
       // If IDN.toASCII fails, it's not valid
       return false;
     }