[Dovecot] dovecot with IMAP and POP3 mixed

Seth Mattinen sethm at rollernet.us
Sun Mar 22 01:46:05 EET 2009

Bill Cole wrote:
> Andreas Meyer wrote, On 3/21/09 11:16 AM:
>> Hello!
>> I tried to setup dovecot to work with IMAP and POP3 but when I connect
>> with Squirrelmail, I get an error saying CREATE "INBOX.Sent"
>> reason: Mailbox doesn't allow inferior mailboxes
> That's for user7, right?
> The cause of that error is SquirrelMail (using IMAP) is trying to create
> a mailbox as a child of INBOX, but since user7 is defined as using mbox
> format, that fails. If you use mbox storage, an IMAP folder can have
> either messages or subfolders but never both, because when using mbox an
> IMAP folder containing messages is a file, while an IMAP folder
> containing subfolders is a directory. See
> http://wiki.dovecot.org/MailboxFormat/mbox for more info.
> There *should* be some way to make SquirrelMail stop trying to create
> its folders under INBOX, but I have no idea if there actually *is* one.
> Some IMAP servers only allow the creation of folders as children of
> INBOX, and as a result some (broken) IMAP clients only know how to
> create folders that way. You can accommodate such software in Dovecot by
> using namespaces.

Run the squirrelmail configure program and change the "default folder
prefix" to blank under "folder defaults".


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