Hi everyone,

Suddenly, the following messages appeared in my Dovecot error log:

master: Warning: Killed with signal 15 (by pid=0 uid=0 code=kill)

Error: Mailbox Trash: Synchronization corrupted index header [...]/Trash/dbox-Mails/dovecot.index: uidvalidity=0, but next_uid=73 Warning: Mailbox Trash: fscking index file [...]/Trash/dbox-Mails/dovecot.index Warning: mdbox([...]/mail/storage): rebuilding indexes: Mailbox Trash index was fsck'd Warning: mdbox([...]/mail/storage): fscking index file [...]/index/inbox/storage/dovecot.map.index Error: Mailbox INBOX: [...]/INBOX/dbox-Mails/dovecot.index reset, view is now inconsistent

The first message is because I restarted the container.

Since then, Thunderbird shows thousands of previously deleted e-mails again in INBOX where all my messages are marked as unread.

• Do you know what can cause it and how can I avoid to happen again?
• Is the used mdbox storage engine that fragile? Is the fault tolerance of other engines better?

I have a backup from some days ago. Is it possible to somehow revert back to it and sync the new e-mails on top of those?

Version: 2.4.2.

Thank you,

Ákos