Dear all,

Two days ago, my ldap server (for authentication) crashed and I had to set up a new one. Everything works fine except the mailbox for one user (let's name him debugger). When I try to access his mail whatever way, dovecot complains about "Error: maildir_file_do(........): Filename keeps changing"

For example, a command "doveadm copy -u debugger@boontje.net Archive mailbox Netspar" returns doveadm(debugger@boontje.net): Error: maildir_file_do(/var/mail/vmail/boontje.net/debugger/mail/Netspar/cur/1423052681.M610997P2829.mail,S=1499407,W=1518981:2,S): Filename keeps changing doveadm(debugger@boontje.net): Error: Copying message UID 1 from 'Netspar' failed: Internal error occurred. Refer to server log for more information. [2016-05-24 13:19:58] doveadm(debugger@boontje.net): Error: maildir_file_do(/var/mail/vmail/boontje.net/debugger/mail/Netspar/cur/1447239217.M843201P13440.mail,S=6052999,W=6131730:2,RSa): Filename keeps changing doveadm(debugger@boontje.net): Error: Copying message UID 2 from 'Netspar' failed: Internal error occurred. Refer to server log for more information. [2016-05-24 13:19:58] doveadm(debugger@boontje.net): Error: maildir_file_do(/var/mail/vmail/boontje.net/debugger/mail/Netspar/cur/1447239226.M993616P13440.mail,S=13920,W=14288:2,S): Filename keeps changing doveadm(debugger@boontje.net): Error: Copying message UID 3 from 'Netspar' failed: Internal error occurred. Refer to server log for more information. [2016-05-24 13:19:58] doveadm(debugger@boontje.net): Error: maildir_file_do(/var/mail/vmail/boontje.net/debugger/mail/Netspar/cur/1449826302.M51386P11767.mail,S=1252017,W=1268393:2,RS): Filename keeps changing doveadm(debugger@boontje.net): Error: Copying message UID 4 from 'Netspar' failed: Internal error occurred. Refer to server log for more information. [2016-05-24 13:19:58]

It does this on ALL mailboxes of this user and only this user. Other users give no problems. Accessing the mails via a mail client (Roundcube, Thunderbird, etc...) give the same error.

Dovecot runs on a virtual machine and the mailboxes are stored via a CIFS-share on a NAS. I rebooted both machines, checked the filesystem (no errors), CIFS-share, directories and mail files are readable and writeable by dovecot user (vmail on the mail server). The mails are intact, cat <filename> shows the full mail.

I'm baffled, any suggestions?

Kind regards,

Ward Romp

The configuration etc....

# 2.2.9: /etc/dovecot/dovecot.conf # OS: Linux 4.2.0-36-generic x86_64 Ubuntu 14.04.4 LTS cifs auth_mechanisms = plain login auth_verbose = yes listen = * mail_home = /var/mail/vmail/%d/%n mail_location = maildir:/var/mail/vmail/%d/%n/mail:LAYOUT=fs managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = /etc/dovecot/conf.d/ldap.conf.ext driver = ldap } plugin { sieve = ~/.dovecot.sieve sieve_after = /var/mail/vmail/sieve-after sieve_before = /var/mail/vmail/sieve-before sieve_dir = ~/sieve } protocols = imap sieve service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0660 user = postfix } } ssl_cert = was automatically rejected:%n%r