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:  <mailto:[email protected]> [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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