diff --git a/config/system/additional.php b/config/system/additional.php
index f0936d0..237c0d3 100644
--- a/config/system/additional.php
+++ b/config/system/additional.php
@@ -23,6 +23,7 @@ $customChanges = [
       'transport_smtp_encrypt' => $_ENV['TYPO3_MAIL_SMTP_ENCRYPT'],
       'transport_smtp_username' => $_ENV['TYPO3_MAIL_SMTP_USER'],
       'transport_smtp_password' => $_ENV['TYPO3_MAIL_SMTP_PASSWORD'],
+      'transport_sendmail_command' => $_ENV['TYPO3_MAIL_SENDMAIL_COMMAND'],
   ],
   'SYS' => [
     'caching' => [