On Jul 1, 2008, at 11:52 PM, Andre Hübner wrote:

Hi List,

last time i did a lot of packaging and installing different versions
of dovecot 1.0.x (rc not included ;) )and all was fine. Now a have a little problem. In this case it was an update from
1.0.13 to 1.1.1 Sometime it happens that 1 user out of x (more than 100) got this
standardmessage for ~1 or ~2 thousend times in his mailbox (mbox)

for example:

...

From MAILER_DAEMON Mon Sep 18 16:16:14 2006 Date: Mon, 18 Sep 2006 16:16:14 +0200 From: Mail System Internal Data MAILER-DAEMON@myhostname Subject: DON'T DELETE THIS MESSAGE -- FOLDER INTERNAL DATA Message-ID: 1158588974@myhostname X-IMAP: 1158588973 0000001177 Status: RO

This text is part of the internal format of your mail folder, and is
not a real message. It is created automatically by the mail system
software. If deleted, important folder data will be lost, and it will be re- created with the data reset to initial values.

These are created by the University of Washington's implementation of
an IMAP server. Notice the date is nearly 2 years ago. At some point,
it seems your site was running imap-uw.

-- Fred

I can follow this in maillog: Jul 1 16:01:04 myhostname dovecot: POP3(username): Disconnected:
Logged out top=0/0, retr=1177/21638, del=1177/1177, size=454

The Mails came from nowhere from one moment to other. But it seems
that it was not first pop-login after dovecot update. Update time was 14:57 Uhr. Pop-Login which "created" this mails was
3rd after update. It is not a big problem, seems to happens one only time but i want
to know the backgrounds. Do you need further data? My 1.1.1 /etc/dovecot.conf looks like this:

protocols = imap imaps pop3 pop3s ssl_disable = no ssl_cert_file = "/etc/*.hostname.com.crt" ssl_key_file = "/etc/*.hostname.com.key" ssl_ca_file = "/etc/*.hostname.com.bundle.crt" disable_plaintext_auth = no syslog_facility = mail login_user = dovecot login_process_per_connection = no login_processes_count = 1 login_greeting = hostname.com mailserver ready. login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c login_log_format = %$: %s max_mail_processes = 100 verbose_proctitle = yes auth_verbose = yes mail_location = mbox:~/mail:INBOX=/var/spool/mail/%u #default_mail_env = mbox:~/mail:INBOX=/var/spool/mail/%u mail_cache_min_mail_count = 30 mmap_disable=no mail_debug=no lock_method = flock mbox_read_locks = dotlock mbox_write_locks = dotlock fcntl mbox_dirty_syncs = yes mbox_very_dirty_syncs = yes mbox_lazy_writes = no

## ## IMAP specific settings ##

protocol imap { login_executable = /usr/libexec/dovecot/imap-login imap_client_workarounds = outlook-idle netscape-eoh tb-extra-mailbox- sep delay-newmail mail_plugins = mail_log }

## ## POP3 specific settings ##

protocol pop3 { ssl_disable = no login_executable = /usr/libexec/dovecot/pop3-login mail_executable = /usr/libexec/dovecot/pop3 pop3_no_flag_updates = no pop3_uidl_format = %08Xu%08Xv pop3_client_workarounds = oe-ns-eoh outlook-no-nuls }

## ## Authentication processes auth default { mechanisms = plain

passdb shadow { }

userdb passwd { }

user = root }

## ## Plugins ##

plugin { }

Thanks Andre