February 2013 - dovecot

[Dovecot] When imapc can't connect to remote IMAP prevents user login (and blocks LDA)
by Marcin Mirosław 28 Oct '13

28 Oct '13

Hi! I'm using dovecot 2.1.12-r1. When remote imap server rejects connections then I can't login into account and MTA can't deliver emails to maildir also. I'm attaching snippets of logs: 2012-12-15T18:05:43.072594+01:00 meteor dovecot: imap-login: Login: user=<marcin(a)mejor.pl>, method=PLAIN, rip=2001:470:1f0b:1ab3:50af:bef4:6918:78ad, lip=2001:470:1f15:1b61::2, mpid=32533, TLS, session=<T0GGKOfQCQAgAQRwHwsas1CvvvRpGHit> 2012-12-15T18:05:43.442598+01:00 meteor dovecot: imap(marcin(a)mejor.pl) <T0GGKOfQCQAgAQRwHwsas1CvvvRpGHit>: Error: imapc(imap.wp.pl:143): Server disconnected: Connection reset by peer 2012-12-15T18:05:43.442598+01:00 meteor dovecot: imap(marcin(a)mejor.pl) <T0GGKOfQCQAgAQRwHwsas1CvvvRpGHit>: Error: imapc(imap.wp.pl:143): Authentication failed: Disconnected from server 2012-12-15T18:05:43.442598+01:00 meteor dovecot: imap(marcin(a)mejor.pl) <T0GGKOfQCQAgAQRwHwsas1CvvvRpGHit>: Error: imapc: Command failed: Disconnected from server 2012-12-15T18:05:43.442598+01:00 meteor dovecot: imap(marcin(a)mejor.pl) <T0GGKOfQCQAgAQRwHwsas1CvvvRpGHit>: Error: user marcin(a)mejor.pl: Initialization failed: Namespace 'xxx-wp-pl.': imapc: LIST failed: Internal error occurred. Refer to server log for more information. [2012-12-15 18:05:43] 2012-12-15T18:05:43.442598+01:00 meteor dovecot: imap(marcin(a)mejor.pl) <T0GGKOfQCQAgAQRwHwsas1CvvvRpGHit>: Error: Invalid user settings. Refer to server log for more information. And snippet when LDA tries to deliver email: 2012-12-15T18:00:54.689877+01:00 meteor dovecot: lda(marcin(a)mejor.pl) <>: Error: imapc(imap.wp.pl:143): Server disconnected: Connection reset by peer 2012-12-15T18:00:54.689877+01:00 meteor dovecot: lda(marcin(a)mejor.pl) <>: Error: imapc(imap.wp.pl:143): Authentication failed: Disconnected from server 2012-12-15T18:00:54.689877+01:00 meteor dovecot: lda(marcin(a)mejor.pl) <>: Error: imapc: Command failed: Disconnected from server 2012-12-15T18:00:54.689877+01:00 meteor dovecot: lda(marcin(a)mejor.pl) <>: Error: user marcin(a)mejor.pl: Initialization failed: Namespace 'xxx-wp-pl.': imapc: LIST failed: Internal error occurred. Refer to server log for more information. [2012-12-15 18:00:54] 2012-12-15T18:00:54.689877+01:00 meteor dovecot: lda(marcin(a)mejor.pl) <>: Fatal: Invalid user settings. Refer to server log for more information. I'd like to ask is this behavior correct? Thanks, Marcin doveconf -n: # 2.1.12: /etc/dovecot/dovecot.conf # OS: Linux 3.6.8-hardened x86_64 Gentoo Base System release 2.1 auth_cache_size = 1 k auth_mechanisms = login digest-md5 cram-md5 plain deliver_log_format = msgid=%m: from=%f: phys=%p: virt=%w %$ dict { quota = pgsql:/etc/dovecot/dovecot-dict-sql.conf.ext } first_valid_uid = 8 last_valid_uid = 8 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_attachment_dir = /dane/domeny/zalaczniki mail_attachment_min_size = 10000 k mail_cache_min_mail_count = 20 mail_gid = mail mail_log_prefix = "%s(%u) <%{session}>: " mail_plugins = autocreate quota notify mail_log stats zlib mail_privileged_group = mail mail_uid = mail maildir_stat_dirs = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy incl ude variables body enotify environment mailbox date ihave mdbox_preallocate_space = yes mdbox_rotate_interval = 60 days mdbox_rotate_size = 50 M namespace inbox { inbox = yes list = 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 = . subscriptions = yes } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { autocreate = Trash autocreate2 = Spam autocreate3 = Sent autocreate4 = Drafts autosubscribe = Trash autosubscribe2 = Spam autosubscribe3 = Sent autosubscribe4 = Drafts quota = dict:User quota::proxy::quota quota_exceeded_message = Quota exceeded / Skrzynka odbiorcy jest przepelniona, wiadomosc nie zostala dostarczona sieve = ~/.dovecot.sieve sieve_dir = ~/sieve stats_command_min_time = 1 mins stats_domain_min_time = 12 hours stats_ip_min_time = 12 hours stats_memory_limit = 1M stats_refresh = 30 s stats_session_min_time = 15 mins stats_track_cmds = yes stats_user_min_time = 1 hours zlib_save = gz } postmaster_address = postmaster(a)mejor.pl protocols = imap pop3 sieve service auth { unix_listener auth-userdb { group = mail mode = 0660 user = root } } service dict { unix_listener dict { user = mail } } service stats { fifo_listener stats-mail { mode = 0600 user = mail } } ssl_cert = </etc/ssl/gwiazdka.mejor.pl.pem ssl_key = </etc/ssl/gwiazdka.mejor.pl.pem userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_proctitle = yes protocol lda { mail_plugins = autocreate quota notify mail_log stats zlib sieve } protocol imap { mail_max_userip_connections = 25 mail_plugins = autocreate quota notify mail_log stats zlib imap_quota imap_stats imap_zlib }

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[Dovecot] "Renaming not supported across conflicting directory permissions"
by Richard Platel 25 Oct '13

25 Oct '13

Is it possible to disable this check in 2.1.7? (without a patch and re-compile?)

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[Dovecot] OT: z-Push
by Christian Rößner 04 Sep '13

04 Sep '13

Hi, just a short question: I have installed and configured z-Push to use BackendIMAP. On my iPhone I have created an account and I can see my mails. Also sending works. So far so good. Now the question: When I create a new folder i.e. Test under the root (/), then I get an error. And after resyncing the folder has been created not under /, but under /0/Test. Also I can not remove that folder over ActiveSync. Does somebody have z-Push fully working with Dovecot or is z-Push designed for Cyrus and only some features are working with Dovecot? So at the moment folder create/move/delete does not work here with z-Push-2.0.3 and Dovecot 2.1.9 Thanks in advance -Christian Rößner --- Bachelor of Science Informatik Erlenwiese 14, 36304 Alsfeld T: +49 6631 78823400, F: +49 6631 78823409, M: +49 176 93118939 USt-IdNr.: DE225643613, http://www.roessner-network-solutions.com

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[Dovecot] DRAC plugin for Dovecot-2.x
by USUDA Hisashi 20 Aug '13

20 Aug '13

Hello All, I released the DRAC plugin for dovecot-2.x. http://sourceforge.jp/projects/dovecot2-drac/ It's based the plugin for dovecot-1.1: http://dovecot.org/patches/1.1/drac.c Please see README file for details. Best regards, -- mailto:usuda@designet.co.jp

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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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[Dovecot] Wrong remote IP (rip) in mail.log using IMAP login
by tyli 02 Aug '13

02 Aug '13

Dear list users While trying to secure our dovecot server with fail2ban I came across the following problem: We use dovecot (1.2.9, ubuntu package) behind a NAT, and failed login attempts are logged with our firewall as the remote ip. Example: Apr 15 08:36:26 mail dovecot: imap-login: Disconnected (auth failed, 6 attempts): user=<xy>, method=PLAIN, rip=192.168.0.1, lip=192.168.0.3 Therefore I would ban 192.168.0.1 which means that I ban EVERY user. Funny thing is that POP3 login attempts are logged correctly: Apr 13 11:05:50 mail dovecot: pop3-login: Disconnected (auth failed, 1 attempts): user=<sgvyniwx>, method=PLAIN, rip=217.81.27.55, lip=192.168.0.3 Any ideas how to change this? Thanks in advance tyli

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[Dovecot] how to setup different quota for multiple namespaces
by Andreas Oster 29 Jul '13

29 Jul '13

Hello all, I am using dovecot for some time now but always had very basic configurations. I recently have configured a new, additional namespace in order to move archived mails (Thunderbird Archives) to another storage system. namespace { type = private separator = . prefix = Archives. location = maildir:/var/vmail/archive/%Ln/Maildir subscriptions = yes list = children inbox = no } This works well but unfortunately I cannot find a solution to either ignore this new namespace from quota computation or add a separate quota value for it. I have integrated user authentication with LDAP and fetch some user attributes from LDAP entries: user_attrs = =home=/var/vmail/%Ln/Maildir,=mail=maildir:/var/vmail/%Ln/Maildir/,otherPager=quota_rule=*:storage=%$ I configured the quota plugin in the following way: plugin { quota = maildir:User quota:ns= quota2 = maildir:Archive quota:ns=Archives. quota_rule = *:storage=1G quota_rule2 = ns=Archives.:ignore } unfortunately this does not give the desired result. Folders under the Archives namespace use the same quota as INBOX. Does anyone have an idea how to fix this ? Thank you for your kind help Andreas

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[Dovecot] Proxying improvements in v2.1.2
by Timo Sirainen 16 Jul '13

16 Jul '13

I just committed a couple of features that will make life easier for some types of proxying setups: 1. IMAP proxying has already for a while supported sending local/remote IP/port to backend server, which can use it for logging and other purposes. I've now implemented this for POP3 as well, although only the remote IP/port is forwarded, not local IP/port. I implemented this also for LMTP in v2.2 tree, but haven't bothered to backport that change. Both POP3 and LMTP uses XCLIENT command that is compatible to Postfix's (XCLIENT ADDR=1.2.3.4 PORT=110). 2. proxy_maybe=yes + host=host.example.com actually works now. As long as host.example.com DNS lookup returns one IP that belongs to the current server the proxying is skipped. 3. auth_proxy_self = 1.2.3.4 setting means that if proxy_maybe=yes and host=1.2.3.4 then Dovecot assumes that this is a local login and won't proxy it, even if 1.2.3.4 isn't the actual local IP. This can be helpful if the host field contains load balancer's IP address instead of the server's. You can add more than one IP (space separated) and of course everything related to this works just as well with hostnames as with IPs (even when hostname expands to multiple IPs).

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[Dovecot] Zero-sized Maildir files and index corruption on over-quota
by Edgar Fuß 28 Jun '13

28 Jun '13

We are using Postfix as an MTA delivering via Dovecot's LDA (with sieve). We also use Dovecot as a POP/IMAP server. Mail storage is Maildir on NFS, indexes are stored locally. Quotas are FS quotas enforced by the NFS server. The Dovecot version is 1.2.11. Recently, for one user being over quota, some attempts to deliver mail bounced as expected while some others resulted in zero-sized Maildir files. I can verify zero-sized files in cur, while I cannot tell whether they were already zero-sized in new. However, since nobody except Dovecot is accessing the mail storage, it's either Dovecot's LDA or Dovecot's IMAP producing the zero-sized files. Logs show successful delivery (deliver: stored mail into mailbox 'INBOX') but ,,Corrupted index cache file /var/db/dovecot/indexes/XXX/.INBOX/dovecot.index.cache: Corrupted virtual size for uid=YYY: 0 != NNNN'' alerts on IMAP access. It looks like all mails which correctly got bounced are >64KB while those resulting in zero-sized files are <64KB (there is one >32KB). My first guess would be that maybe for large files, write() fails, while for small ones, close() fails or there is some buffering involved for large files.

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[Dovecot] traffic statistics
by Martin Waschbüsch 28 Jun '13

28 Jun '13

Hi all, Does anyone know a good tool to gather traffic statistics for imap? And what level of logging would I need to set for dovecot to make it happen. Ideally this would be able to filter per domain, too. ;-) Thanks a lot, Martin -- Martin Waschbüsch IT-Dienstleistungen Lautensackstr. 16 80687 München Telefon: +49 89 57005708 Fax: +49 89 57868023 Mobil: +49 170 2189794 martin(a)waschbuesch.de http://martin.waschbuesch.de

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