Invalid user returned from quota -f command

[Hiago Prata]

Hi, many users have been complaining about their quota usage being
displayed wrongly. When trying to solve that using QUOTA -F, the command
returned a System I/O Error due to the nonexistence of some invalid
mailboxes that are not even listed under CTL_MBOXLIST -D, such as: ''
(empty string) and DELETED.user.teste3cyrus.5A902111EFJulho
2017.5B2E7DCF4DE7725F3314. 

Here is the full output of the command:

> failed opening header for mailbox 'domain.com!DELETED.user.teste3cyrus.5A902111EFJulho 2017.5B2E7DCF4DE7725F3314': System I/O error: No such file or directory
> processing mbox list for '': System I/O error: No such file or directory

Can anyone that has ever faced something like this help me?

-- 
Hiago Prata
Graduando em Engenharia da Computação
DataCenter da UFPA - CTIC
Faculdade de Engenharia da
Computação e Telecomunicações - ITEC
Universidade Federal do Pará
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