Ticket #37945: 37945.2.patch

wp-includes/pluggable.php

@@ -327 +327 @@
                 if ( substr( $sitename, 0, 4 ) == 'www.' ) {
                         $sitename = substr( $sitename, 4 );
                 }
-
-                $from_email = 'wordpress@' . $sitename;
+                
+                if( empty( $sitename ) ) {
+                        $from_email = get_bloginfo( 'admin_email' );    
+                } else {
+                        $from_email = 'wordpress@' . $sitename;
+                }
         }
 
         /**