diff --git a/lib/sendgrid/class-sendgrid-translator.php b/lib/sendgrid/class-sendgrid-translator.php
index 862d318..bbf25f1 100644
--- a/lib/sendgrid/class-sendgrid-translator.php
+++ b/lib/sendgrid/class-sendgrid-translator.php
@@ -261,7 +261,7 @@ private static function set_bccs_v3(
     foreach ( $email_v2->bcc as $index => $address ) {
       // Check if "bcc name" is set
       $bcc_name = null;
-      if ( self::is_valid_string( $email_v2->bccName[ $index ] ) ) {
+      if ( is_array($email_v2->bccName) && self::is_valid_string( $email_v2->bccName[ $index ] ) ) {
         $bcc_name = trim( $email_v2->bccName[ $index ] );
       }