- dovecot - dovecot.org

[Dovecot] GUID Mismatch Issue
by Jeff Geiger 12 Aug '13

12 Aug '13

Dovecot 2.1.7 While migrating mail from one server (Maildir) to another (mdbox), a config issue caused my dsync to fail on a few accounts. Those accounts received mail on the new server over night and it autocreated new inboxes with new GUIDs. Now dsync wants nothing to do with mirroring between the two (diff GUIDs). Is there a way to fix this? dsync(jeff(a)foo.bar): Error: Mailbox INBOX changed its GUID (0eee4b021dcadd5158550000eed085a1 -> 43f87412a8f00352ac340000be821591) dsync(jeff(a)foo.bar): Error: msg iteration failed: Couldn't open mailbox 0eee4b021dcadd5158550000eed085a1 dsync(jeff(a)foo.bar): Error: Mailbox INBOX changed its GUID (0eee4b021dcadd5158550000eed085a1 -> 43f87412a8f00352ac340000be821591) dsync(jeff(a)foo.bar): Error: Mailbox Trash changed its GUID (0fee4b021dcadd5158550000eed085a1 -> 6300df050ef10352e9350000be821591) dsync(jeff(a)foo.bar): Error: Mailbox Sent changed its GUID (832d1e3663cadd515f5d0000eed085a1 -> 855ef505c0f00352fc340000be821591) I need a way to merge the mailboxes, in either direction, so I can clear out one side and successfully migrate the mail accounts. Any tips or pointers are greatly appreciated.

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[Dovecot] multiple passdbs and auth sockets
by md＠Linux.IT 12 Aug '13

12 Aug '13

I have a few systems which run dovecot 1.x as the authentication backend for Postfix, with multiple auth { } sections like this one, each one with a different passdb and its own socket: auth ldap-10 { passdb ldap { args = /etc/dovecot/dovecot-ldap-10.conf } socket listen { client { path = /var/spool/postfix/private/auth-10 mode = 0666 } } } I need multiple sockets tied to multiple dbs because there are duplicated accounts, but after switching to dovecot 2.1.7 apparently *all* passdbs are checked and dovecot reports this message: Warning: Obsolete setting in /etc/dovecot/conf.d/auth-local.conf.ext:91: add auth_ prefix to all settings inside auth {} and remove the auth {} section completely doveconf shows that all my custom sockets are now part of a single "service auth { }" section, while all the passdbs appear at the top level. How can I update my configuration for dovecot 2.x? -- ciao, Marco

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[Dovecot] Errors in SASL authentication ("attempted master login")
by Grzegorz Staniak 12 Aug '13

12 Aug '13

Hi, I'm using dovecot 2.2.4 (with Postfix 2.8.4) as both the SASL authentication backend and the delivery agent, and I keep getting lines like the following in the dovecot.log from the authentication subsystem: auth: passdb(toshiba1(a)domain,8.8.8.8,master): Attempted master login with no master passdbs (trying to log in as user: plain) The connections come from an old (embedded) mail client in a printer-fax machine. I googled for this specific error, but I only found info about old clients using "user\0user\0pass" string incorrectly during authentication, which caused a problem for earlier, development versions of dovecot. Actually, I recently migrated from 1.2 to 2.2.4 exactly to alleviate this situation, but the errors persist. Is there a way to remove the problem or work around it? Regards, GS -- Grzegorz Staniak <gstaniak [at] gmail _dot_ com>

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[Dovecot] The docs a re a bit weird on "Directory hashing"
by Eliezer Croitoru 12 Aug '13

12 Aug '13

In squid we use a double layer of hashed directories on the FS to allow storage of millions of files. I was reading the "Directory hashing" section but never understood it.. since it's written.. in a way I could not understand. I am using this line: mail_location = maildir:/home/vmail/%d/%n/Maildir/ and I want to migrate to a hash based directory scheme. While trying to understand how that hash will work I stumbled a old thread at: http://www.dovecot.org/list/dovecot/2010-June/049695.html there they used: mail_location=maildir:/buzones/us.es/%1Hu/%2.1u/%n so I assume it should be used like that: mail_location=maildir:/home/vmail/%H/%2.256Hn/%d_%n/Maildir/ or: mail_location=maildir:/home/vmail/%1Mu/%2.1Mu/%d_%n/Maildir/ It's a bit hard to think alone so I hope you can assist me. let say I want to follow the model of squid cache_dir which has: cache_dir aufs /usr/local/squid/var/cache/squid 40000 16 256 And means a two layers cache of max 16 directories on the first layer and 256 directories on the second layer. The above allows millions of files storage and can benefit from all ext4 lower kernel levels of compatibly rather then do stuff on the user-land.. Since I am not 100% sure that the scheme I understood is indeed what I think I assume the above will need a small correction. Eliezer

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[Dovecot] prevent dovecot from modifying maildirs
by Felix Rubio Dalmau 11 Aug '13

11 Aug '13

Hi all, Is there any possibility to ask dovecot to write nothing to disk, something like a "read only" state, without shutting it down? I have set up a ZFS+postfix+dovecot mail server, and I need both postfix (postsuper -h ALL) and dovecot (¿?) to stop modifying the disk to create the snapshot to be saved. Does anybody has any idea on how to achieve this? Regards! Felix

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[Dovecot] constant Log synchronization error's
by Kim Bisgaard 10 Aug '13

10 Aug '13

Hi, I am seeing constant "Log synchronization error"s in my logs. See later for an example. This is dovecot 2.2.4, pigeonhole 0.4.1, and postfix 2.10.1 (with mailbox_command = /usr/libexec/dovecot/deliver) on a Fedora 19 system. I am using packages from Atrpms so there are some patches applied - ask for details. The mailboxes have resently been moved from a i386 system. I have tried to manually do "doveadm force-resync" for all users, but the problem persists :-( Here are an example from a user which does not use sieve: 11:45:48 Y dovecot: imap-login: Login: user=<X>, method=PLAIN, rip=62.199.61.123, lip=192.168.0.5, mpid=21531, TLS, session=<XxDNm3XhdAA+xz17> 11:45:52 Y dovecot: imap-login: Login: user=<X>, method=PLAIN, rip=62.199.61.123, lip=192.168.0.5, mpid=21541, TLS, session=<UewQnHXhAwA+xz17> 11:45:54 Y dovecot: imap(X): Error: mdbox /var/mail/X/mdbox/mailboxes/INBOX/Streams/dbox-Mails: map uidvalidity mismatch (0 vs 1283330954) 11:45:54 Y dovecot: imap(X): Disconnected: Internal error occurred. Refer to server log for more information. [2013-07-14 11:45:54] in=353 out=115680 11:45:54 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/storage/dovecot.map.index 11:45:54 Y dovecot: imap(X): Warning: mdbox /var/mail/X/mdbox/storage: rebuilding indexes 11:45:54 Y dovecot: imap(X): Disconnected: Disconnected in IDLE in=707 out=437806 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=4,offset=156 for /var/mail/X/mdbox/mailboxes/INBOX/Kvitteringer/dbox-Mails/dovecot.index: Ex tension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/INBOX/Kvitteringer/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=9,offset=156 for /var/mail/X/mdbox/mailboxes/INBOX/Streams/dbox-Mails/dovecot.index: Extensi on header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/INBOX/Streams/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=13,offset=156 for /var/mail/X/mdbox/mailboxes/Facebook/dbox-Mails/dovecot.index: Extension h eader update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Facebook/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/Junk/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Junk/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/Sent/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Sent/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=4,offset=156 for /var/mail/X/mdbox/mailboxes/Drafts/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Drafts/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=4,offset=156 for /var/mail/X/mdbox/mailboxes/Archives/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Archives/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap-login: Disconnected (no auth attempts in 1 secs): user=<>, rip=62.199.61.123, lip=192.168.0.5, TLS, session=<dz05nHXh9wA+xz17> 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=4,offset=156 for /var/mail/X/mdbox/mailboxes/Archives/2012/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Archives/2012/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap-login: Login: user=<X>, method=PLAIN, rip=62.199.61.123, lip=192.168.0.5, mpid=21548, TLS, session=<bAs5nHXhfgA+xz17> 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/Trash/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Trash/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap(X): Error: Log synchronization error at seq=4,offset=156 for /var/mail/X/mdbox/mailboxes/Trash/Spam/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:55 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Trash/Spam/dbox-Mails/dovecot.index 11:45:55 Y dovecot: imap-login: Login: user=<X>, method=PLAIN, rip=62.199.61.123, lip=192.168.0.5, mpid=21552, TLS, session=<zCw7nHXh2AA+xz17> 11:45:55 Y dovecot: imap(X): Connection closed: Connection reset by peer in=118 out=111246 11:45:56 Y dovecot: imap-login: Disconnected (no auth attempts in 1 secs): user=<>, rip=62.199.61.123, lip=192.168.0.5, TLS, session=<Ov9MnHXhgwA+xz17> 11:45:56 Y dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=62.199.61.123, lip=192.168.0.5, TLS, session=<OK5RnHXhiAA+xz17> 11:45:56 Y dovecot: imap(X): Error: mdbox /var/mail/X/mdbox/mailboxes/INBOX/Streams/dbox-Mails: map uidvalidity mismatch (0 vs 1283330954) 11:45:56 Y dovecot: imap(X): Disconnected: Internal error occurred. Refer to server log for more information. [2013-07-14 11:45:56] in=353 out=115647 11:45:56 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/storage/dovecot.map.index 11:45:56 Y dovecot: imap(X): Warning: mdbox /var/mail/X/mdbox/storage: rebuilding indexes 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/INBOX/Kvitteringer/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/INBOX/Kvitteringer/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=10,offset=156 for /var/mail/X/mdbox/mailboxes/INBOX/Streams/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/INBOX/Streams/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=14,offset=156 for /var/mail/X/mdbox/mailboxes/Facebook/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Facebook/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=6,offset=156 for /var/mail/X/mdbox/mailboxes/Junk/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Junk/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=6,offset=156 for /var/mail/X/mdbox/mailboxes/Sent/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Sent/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/Drafts/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Drafts/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/Archives/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Archives/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/Archives/2012/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Archives/2012/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=6,offset=156 for /var/mail/X/mdbox/mailboxes/Trash/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Trash/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap(X): Error: Log synchronization error at seq=5,offset=156 for /var/mail/X/mdbox/mailboxes/Trash/Spam/dbox-Mails/dovecot.index: Extension header update points outside header size 11:45:57 Y dovecot: imap(X): Warning: fscking index file /var/mail/X/mdbox/mailboxes/Trash/Spam/dbox-Mails/dovecot.index 11:45:57 Y dovecot: imap-login: Login: user=<X>, method=PLAIN, rip=62.199.61.123, lip=192.168.0.5, mpid=21563, TLS, session=<gs9WnHXhcwA+xz17> 11:45:57 Y dovecot: imap(X): Connection closed: Connection reset by peer in=150 out=111316 11:45:57 Y dovecot: imap-login: Login: user=<X>, method=PLAIN, rip=62.199.61.123, lip=192.168.0.5, mpid=21568, TLS, session=<4y1hnHXhkQA+xz17> 11:46:05 Y dovecot: imap-login: Login: user=<X>, method=PLAIN, rip=62.199.61.123, lip=192.168.0.5, mpid=21574, TLS, session=<+zbNnHXhBAA+xz17> My config is: # dovecot -n # 2.2.4: /etc/dovecot/dovecot.conf # OS: Linux 3.9.9-301.fc19.x86_64 x86_64 Fedora release 19 (Schrödinger’s Cat) ext4 mail_location = mdbox:/var/mail/%u/mdbox mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = separator = . } passdb { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +imapflags sieve_subaddress_sep = - } postmaster_address = postmaster(a)alleroedderne.adsl.dk protocols = imap recipient_delimiter = - ssl = required ssl_cert = </etc/pki/dovecot/certs/dovecot.pem ssl_key = </etc/pki/dovecot/private/dovecot.pem userdb { driver = passwd } protocol lda { mail_plugins = " sieve" } Regards, Kim

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[Dovecot] Mailbox Format
by Vijay Rajah 10 Aug '13

10 Aug '13

Hello List, I'm in the process of implementing a new mail server environment from scratch. I was wondering, what mailbox format is recommended? I have been using maildir format for my other projects. I would like to use some format that provides Single Instance Storage. I'm using postfix 2.11 and will use lmtp. I will be using dovecot 2.2.5 (Latest) version. I'm not planning on using NFS (if that matters) and will use dsync to backup mails to another server. Thanks in Advance Vijay Rajah

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Re: [Dovecot] prevent dovecot from modifying maildirs
by Joseph Tam 10 Aug '13

10 Aug '13

> In order to save space I prefer no to have such half-files (mails) , > and it is for this reason that I am asking if there is any way to > prevent this. > > I'm not an expert in field of file systems, so I can be asking very > naive questions... but I appreciate your comments on this topic. Filesystem consistency is different than, for lack of a better term, dovecot consistency. The latter places additional constraints on the content of files, rather than treating them as sequences of disk blocks. I don't think you can ensure the latter without stopping all dovecot processes (and maybe the MTA/LDA as well), which will be much more difficult and disruptive than just taking a snapshot. (I think some snapshot aware application like databases and hypervisors allows the operator to put the application in a state of acquiesence, long enough to take a snapshot, then unblock all processes after the snapshot.) I'd take the suggestion of the previous poster: take snapshots, don't worry, be happy. The small amount of inconsistencies is trivial compared with quickly recovering a mail store after disaster. Joseph Tam <jtam.home(a)gmail.com>

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Re: [Dovecot] How to troubleshoot LDA or LMTP?
by Joseph Tam 10 Aug '13

10 Aug '13

John Williams writes: > *What doesn't work* I thought the next step would be to execute > dovecot-lda manually (as is suggested on the wiki and in numerous > newsgroup posts), but I can't figure out how to do this. When I execute > it as root and provide my non-root username via the -u option, it > hangs. I can see that it spawns a child process that executes as the > non-root user (specified with the -u option). So, could someone tell > how to execute dovecot-lda manually please? Maybe use "-d"? I had no trouble invoking dovecot-lda -c config-file -d user < mailfile If it doesn't work for you, I suggest process tracing it. > Also, when does LMTP process messages? When sending mail via SMTP, or > when reading mail via IMAP? I would prefer to use LMTP rather than > LDA. The former. Joseph Tam <jtam.home(a)gmail.com>

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[Dovecot] execvp /usr/local/libexec/dovecot/dovecot-lda: Permission denied
by Edward Carraro 09 Aug '13

09 Aug '13

I'm trying to follow the instructions for configuring Dovecot LMTP with postfix for virtual domains but whenever mail arrives, in /var/log/maillog, I see Sep 23 16:01:20 mybox postfix/pipe[572]: 999C83206C6: to=< user(a)mytest.domain.com>, relay=dovecot, delay=0.08, delays=0.04/0.01/0/0.03, dsn=4.3.0, status=deferred (temporary failure. Command output: pipe: fatal: pipe_command: execvp /usr/local/libexec/dovecot/dovecot-lda: Permission denied ) ls -lh for /usr/local/libexec/dovecot/dovecot-lda -rwxr-xr-x 1 root staff 62K Sep 20 15:15 dovecot-lda It will deliver mail when I do the sudo invocation of dovecot-lda, but I thought LMTP was suppose to be an alternative to that postfix/main.cf: virtual_transport = dovecot virtual_mailbox_domains = mytest.domain.com dovecot_destination_recipient_limit = 1 /etc/postfix/master.cf: dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/local/libexec/dovecot/dovecot-lda -f ${sender} -d ${recipient} /usr/local/etc/dovecot/conf.d/10-master.conf: service auth { unix_listener auth-userdb { mode = 0600 user = vmail #group = vmail } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } inet_listener lmtp { port = 24 } user = vmail } Did I miss something in my config?

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