I noticed that the Mailbox destroyer does not work. It seems there is a missing function.
Here my session:
# ./cli/destroy-mailbox FOO@example.com Are you F*****G sure to DESTROY the mailbox 'FOO@example.com' FOREVER? [y/n] y PHP Fatal error: Uncaught Error: Call to undefined function sanitize_subdirectory() in include/class-Domain.php:77 Stack trace: #0 include/class-Domain.php(218): Mailbox->getDomainDirname() #1 include/class-Mailbox.php(144): Mailbox->getDomainMailboxesPath() #2 include/class-MailboxDestroyer.php(49): Mailbox->getMailboxPath() #3 scripts/mailbox/destroy.php(97): MailboxDestroyer::destroy(Object(Mailbox)) #4 {main} thrown in include/class-Domain.php on line 77