| Name | Lines of code | Maintainability | Test coverage |
| include/phpmailer_bmh/class.phpmailer-bmh.php | 374 | F 4 days | |
| include/task.inc.php | 408 | F 5 days | |
| xoops_version.php | 410 | B 5 hrs | |
| admin/maintenance.php | 475 | F 1 wk | |
| language/german/admin.php | 478 | C 7 hrs | |
| language/english/admin.php | 479 | C 7 hrs | |
| letter.php | 517 | F 5 days | |
| include/functions.php | 540 | F 1 wk | |
| include/phpmailer/class.smtp.php | 558 | F 5 days | |
| include/phpmailer/extras/htmlfilter.php | 690 | F 1 wk | |
| subscription.php | 857 | D 2 days | |
| include/phpmailer_bmh/phpmailer-bmh_rules.php | 1,318 | F 2 wks | |
| include/phpmailer/class.phpmailer.php | 2,188 | F 3 wks |