convert mdbox to maildir

Patrick Domack patrickdk at
Sun Aug 14 02:22:25 UTC 2022

Not sure what this had to do with the question asked.
You're using mbox, but he is using mdbox.
Postfix is unable to write to mdbox itself.

Quoting justina colmena ~biz <justina at>:

> *My* inbox gets filled with thousands of emails, more or less  
> commercial content and trivial notifications from shopping online,  
> and postfix crashes and will not accept new messages if the file  
> "/var/mail/justina" becomes too large.
> Configuring postfix to deliver the mail to "~/Maildir" solved that problem.
> I still need to configure a sieve or a filter or some nicer  
> mechanism to clear out messages that are either outright spam or too  
> old or no longer of interest to me.
> On August 13, 2022 10:00:36 AM AKDT, Marc <marc at> wrote:
>>> We need to move all users from one (pretty old) installation of dovecot
>>> to a new one.
>>> The old one uses mdbox for users' mailboxes and maildir for
>>> shared/public mailboxes.
>>> The new one must be maildir only.
>> why did you decide to move to maildir?
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.

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