diff --git a/class.phpmailer.php b/class.phpmailer.php
index a0ed242c..dd06dd58 100644
--- a/class.phpmailer.php
+++ b/class.phpmailer.php
@@ -850,7 +850,7 @@ class PHPMailer
         $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim
         if (($pos = strrpos($address, '@')) === false) {
             // At-sign is misssing.
-            $error_message = $this->lang('invalid_address') . $address;
+            $error_message = $this->lang('invalid_address') . " (addAnAddress $kind): $address";
             $this->setError($error_message);
             $this->edebug($error_message);
             if ($this->exceptions) {
@@ -900,7 +900,7 @@ class PHPMailer
             return false;
         }
         if (!$this->validateAddress($address)) {
-            $error_message = $this->lang('invalid_address') . $address;
+            $error_message = $this->lang('invalid_address') . " (addAnAddress $kind): $address";
             $this->setError($error_message);
             $this->edebug($error_message);
             if ($this->exceptions) {
@@ -994,7 +994,7 @@ class PHPMailer
         if (($pos = strrpos($address, '@')) === false or
             (!$this->has8bitChars(substr($address, ++$pos)) or !$this->idnSupported()) and
             !$this->validateAddress($address)) {
-            $error_message = $this->lang('invalid_address') . $address;
+            $error_message = $this->lang('invalid_address') . " (setFrom) $address";
             $this->setError($error_message);
             $this->edebug($error_message);
             if ($this->exceptions) {
@@ -1216,7 +1216,7 @@ class PHPMailer
                 }
                 $this->$address_kind = $this->punyencodeAddress($this->$address_kind);
                 if (!$this->validateAddress($this->$address_kind)) {
-                    $error_message = $this->lang('invalid_address') . $this->$address_kind;
+                    $error_message = $this->lang('invalid_address') . ' (punyEncode) ' . $this->$address_kind;
                     $this->setError($error_message);
                     $this->edebug($error_message);
                     if ($this->exceptions) {