Command died with signal 6

Hello,

I've been using the panel for a couple of weeks, and since I met the one with the mailbox I can not get letters and gives the following error:

Queue reason:
ADD53540118     4725 Thu Sep 28 09:34:25  send@send.com

                  (Command died with signal 6: "/usr/libexec/dovecot/deliver")
                                         user@mail.mail

The other case is with this box again, the inbox messages have disappeared and have not been deleted.

you should check this log files

/var/log/maillog
dovecot-debug.log  dovecot-info.log   dovecot.log

maillog :

Sep 28 09:24:53 vmi135262 policyd-spf[10349]: Pass; identity=helo; client-ip=1.1.1.1; helo=send.com envelope-from=send@send.com; receiver=user@mail.mail
Sep 28 09:24:53 vmi135262 policyd-spf[10349]: Pass; identity=mailfrom; client-ip=1.1.1.1; helo=send.com; envelope-from=send@send.com; receiver=user@mail.mail
Sep 28 09:24:53 vmi135262 postfix/qmgr[11160]: B728654023C: from=<send@send.com>, size=4420, nrcpt=1 (queue active)
Sep 28 09:34:26 vmi135262 policyd-spf[12277]: Pass; identity=helo; client-ip=193.68.112.200; helo=send.com; envelope-from=send@send.com; receiver=user@mail.mail
Sep 28 09:34:26 vmi135262 policyd-spf[12277]: Pass; identity=mailfrom; client-ip=193.68.112.200; helo=send.com; envelope-from=send@send.com; receiver=user@mail.mail
Sep 28 09:34:26 vmi135262 postfix/qmgr[11160]: 2AB42540A5F: from=<send@send.com>, size=4458, nrcpt=1 (queue active)
Sep 28 09:42:04 vmi135262 postfix/qmgr[11160]: 2AB42540A5F: from=<send@send.com>, size=4458, nrcpt=1 (queue active)
Sep 28 09:52:04 vmi135262 postfix/qmgr[11160]: 2AB42540A5F: from=<send@send.com>, size=4458, nrcpt=1 (queue active)
Sep 28 10:12:04 vmi135262 postfix/qmgr[11160]: 2AB42540A5F: from=<send@send.com>, size=4458, nrcpt=1 (queue active)
Sep 28 10:23:26 vmi135262 postfix/qmgr[11160]: 2AB42540A5F: from=<send@send.com>, size=4458, nrcpt=1 (queue active)
Sep 28 10:23:26 vmi135262 postfix/pickup[10139]: ADD53540118: uid=89 from=<send@send.com> orig_id=2AB42540A5F
Sep 28 10:23:26 vmi135262 postfix/qmgr[11160]: ADD53540118: from=<send@send.com>, size=4725, nrcpt=1 (queue active)
Sep 28 10:32:04 vmi135262 postfix/qmgr[11160]: ADD53540118: from=<send@send.com>, size=4725, nrcpt=1 (queue active)
Sep 28 10:42:04 vmi135262 postfix/qmgr[11160]: ADD53540118: from=<send@send.com>, size=4725, nrcpt=1 (queue active)
Sep 28 11:02:04 vmi135262 postfix/qmgr[11160]: ADD53540118: from=<send@send.com>, size=4725, nrcpt=1 (queue active)
Sep 28 11:42:04 vmi135262 postfix/qmgr[11160]: ADD53540118: from=<send@send.com>, size=4725, nrcpt=1 (queue active)
Sep 28 12:52:54 vmi135262 postfix/qmgr[13069]: ADD53540118: from=<send@send.com>, size=4725, nrcpt=1 (queue active)

dovecot:

Sep 28 12:52:54 lda(user@mail.mail): Panic: file mail-index-sync-keywords.c: line 227 (keywords_update_records): assertion failed: (data_offset >= sizeof(struct mail_index_record))
Sep 28 12:52:54 lda(user@mail.mail): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0x6a06e) [0x7f095d4a706e] -> /usr/lib64/dovecot/libdovecot.so.0(default_fatal_handler+0x2a) [0x7f095d4a70da] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f095d45f52c] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_sync_keywords+0x808) [0x7f095d7de5c8] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_sync_record+0xfd) [0x7f095d7deeed] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_sync_map+0x21e) [0x7f095d7dfe8e] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_map+0x3e7) [0x7f095d7d0b77] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xb937d) [0x7f095d7cc37d] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xb9990) [0x7f095d7cc990] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_open+0x8c) [0x7f095d7cca7c] -> /usr/lib64/dovecot/libdovecot-storage.so.0(index_storage_mailbox_open+0x87) [0x7f095d7bd9c7] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x4d882) [0x7f095d760882] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x4d963) [0x7f095d760963] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x802b4) [0x7f095d7932b4] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_open+0x20) [0x7f095d793430] -> /usr/lib64/dovecot/libdovecot-lda.so.0(mail_deliver_save_open+0xad) [0x7f095da3840d] -> /usr/lib64/dovecot/libdovecot-sieve.so.0(+0x3f0a2) [0x7f095c5fe0a2] -> /usr/lib64/dovecot/libdovecot-sieve.so.0(+0x35d2b) [0x7f095c5f4d2b] -> /usr/lib64/dovecot/libdovecot-sieve.so.0(sieve_result_execute+0x448) [0x7f095c5f6478] -> /usr/lib64/dovecot/libdovecot-sieve.so.0(sieve_execute+0x56) [0x7f095c6061b6] -> /usr/lib64/dovecot/lib90_sieve_plugin.so(+0x316b) [0x7f095c84e16b] -> /usr/lib64/dovecot/libdovecot-lda.so.0(mail_deliver+0x4a) [0x7f095da38b3a] -> /usr/libexec/dovecot/deliver(main+0x3b5) [0x56082af20885] -> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f095d09bc05] -> /usr/libexec/dovecot/deliver(+0x318c) [0x56082af2118c]

dovecot-info.log:

Sep 28 12:38:01 imap-login: Info: Login: user=<user@mail.mail>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=13113, secured, session=<3TqogD1aAAB/AAAB>
Sep 28 12:38:02 imap-login: Info: Login: user=<user@mail.mail>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=13208, secured, session=<s3K7gD1aBAB/AAAB>

I found a solution by renaming dovecot.index

mv dovecot.index dovecot.index.back

then logged in to the postal account