mbox is not an incompatible format. Roundcube uses your MTA like dovecot
to retrieve the mails, so as long as your mail server is configured
properly it should be able to retrieve all your messages. I used mbox
for years, inherited from an older sistem (openwebmail) which DID depend
on mbox. We migrated to maildir because it is faster, more secure and
easier to index and back up. (imagine having to delete messages from a
3GB mbox file)
El 2026-02-13 07:04, James Yu Wang via Users escribió:
You may want to check the messages to see if they are in an
incompatible format like mbox.
From: Nikolas Adi via Users <[email protected]>
Sent: Wednesday, February 11, 2026 11:12 PM
To: [email protected]
Cc: Nikolas Adi <[email protected]>
Subject: [RCU] INBOX shows 'No messages found' but messages exist in
Email Disk Usage
Dear Roundcube Support Team,
I am experiencing an issue with one of our email accounts hosted on
cPanel (Niagahoster).
Email account: [email protected]
Problem description:
· In Roundcube Webmail, the INBOX displays the message: "No
messages found".
· However, in cPanel → Email Disk Usage, it shows that there are
49 messages in the INBOX.
· Email storage is not full (396.91 MB used out of 1 GB).
· There are no active email filters.
· The INBOX folder is subscribed (default and cannot be
disabled).
This indicates that the messages physically exist on the server, but
Roundcube is unable to display them.
Could this be related to:
· IMAP index corruption?
· Dovecot index/cache issue?
· Roundcube cache problem?
Please advise on the recommended steps to resolve this issue.
Thank you for your assistance.
Best regards,
Niko
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