- dovecot - dovecot.org

[Dovecot] Grant access for Unix-User _and_ virtual Users
by marco 26 Sep '13

26 Sep '13

Hi group, I have installed a postfix as an MTA and configured two "main" domains as well as two virtual mailbox domains. Normal unix users have their maildir in their homes (/home/%u) and the virtual mailboxes are located in /var/mail/vhosts. It works well, I only have a problem configuring dovecot. I wondered if it's possible to configure it in a way that both, unix users and virtual users, can access their mailboxes. I found some tutorials but they either give access to the "normal" unix users or to virtual users who are defined in a text file. Here some system infos: - Ubuntu 12.04.2 LTS (Kernel Version: 3.2.0-23) - Dovecot Version: 2.0.19 Hope you understand my problem. Cheers, Marco PS: It's the very first time I use a mailing list, so I hope you can forgive me possible beginner's mistakes.

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[Dovecot] Dsync: Mailbox changes caused a desync.
by Aleksey Tsvetkov 26 Sep '13

26 Sep '13

Hi! Here such synchronization error: dovecot: dsync-local(alex(a)aaa.com): Warning: Mailbox changes caused a desync. You may want to run dsync again. dovecot: dsync-remote(alex(a)aaa.com): Warning: /var/mail/virtual/aaa.com/alex/.INBOX.System/dovecot-uidlist: Duplicate file entry at line 2298: 1380157263.M585262P25253.mail1.aaa.com,S=2476,W=2553 (uid 3645 -> 3662) dovecot: dsync-remote(alex(a)aaa.com): Warning: Maildir /var/mail/virtual/aaa.com/alex/.INBOX.System: Expunged message reappeared, giving a new UID (old uid=3650, file=1380157264.M261919P17392.mail2.aaa.com,S=2476,W=2553) dovecot: dsync-remote(alex(a)aaa.com): Warning: Maildir /var/mail/virtual/aaa.com/alex/.INBOX.System: Expunged message reappeared, giving a new UID (old uid=3651, file=1380157263.M586977P17315.mail2.aaa.com,S=3119,W=3175) dovecot: dsync-remote(alex(a)aaa.com): Warning: Maildir /var/mail/virtual/aaa.com/alex/.INBOX.System: Expunged message reappeared, giving a new UID (old uid=3652, file=1380157264.M261920P17392.mail2.aaa.com,S=2476,W=2553) dovecot: dsync-remote(alex(a)aaa.com): Warning: Maildir /var/mail/virtual/aaa.com/alex/.INBOX.System: Expunged message reappeared, giving a new UID (old uid=3653, file=1380157264.M261921P17392.mail2.aaa.com,S=3119,W=3175) dovecot: dsync-remote(alex(a)aaa.com): Warning: Maildir /var/mail/virtual/aaa.com/alex/.INBOX.System: Expunged message reappeared, giving a new UID (old uid=3654, file=1380157263.M819006P25260.mail2.aaa.com,S=2476,W=2553:2,) dovecot: dsync-remote(alex(a)aaa.com): Warning: Maildir /var/mail/virtual/aaa.com/alex/.INBOX.System: Expunged message reappeared, giving a new UID (old uid=3655, file=1380157264.M261922P17392.mail2.aaa.com,S=3119,W=3175:2,) As a result, synchronization was, but there were duplicate emails. After this synchronization is working fine, no more errors. dovecot --version 2.2.5 dovecot --build-options Build options: ioloop=kqueue notify=kqueue ipv6 openssl io_block_size=8192 Mail storages: shared mdbox sdbox maildir mbox cydir imapc pop3c raw fail SQL drivers: mysql Passdb: checkpassword pam passwd passwd-file sql Userdb: checkpassword nss passwd prefetch passwd-file sql Thanks! -- Best regards, Aleksey Tsvetkov System Administrator Company Grand Vision tel. +7(495)933-39-79, ext. 184

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[Dovecot] Passing info from mail process to mail_filter plugin script?
by Charles Cazabon 26 Sep '13

26 Sep '13

Hi, all, The mail_filter plugin allows you to pass messages through an external script/command on the way into and out of the Maildir/mbox/etc mail store. With the recent/new version of the plugin, this seems to work correctly. However, my mail-filter script (for filtering messages on the way from the mail store through the IMAP process to a remote client) needs some extra info from the IMAP mail process. I'm having difficulty figuring out how this can be accomplished. Ideally, I'd like to pass another open file descriptor (opened in the IMAP process) to the script, but I'm not sure if this is possible. Opening the file in the IMAP main.c fails, presumably due to file descriptor limits, but I don't see where restrict_fd_limit() is called there. My second choice for passing this info would be in an environment variable or argument to the mail filter script. Adding env_put() to the IMAP code doesn't seem to get the value passed to the script, presumably because the environment is getting cleared, but again I'm not certain where the list of env vars to keep is set here. There may be another way to accomplish this that I'm not thinking of? Any assistance would be appreciated. Charles -- ----------------------------------------------------------------------- Charles Cazabon GPL'ed software available at: http://pyropus.ca/software/ -----------------------------------------------------------------------

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[Dovecot] "service_count = 0" for "service dict" (High-performance mode)
by Alessio Cecchi 25 Sep '13

25 Sep '13

Hi, I'm running dovecot 2.1.17 with "Login processes" in "High-performance mode" as explained here: service imap-login { service_count = 1 http://wiki2.dovecot.org/LoginProcess but i thinks I should also set "service dict" in high-performance mode since sometimes the number of dict processes reach the limit of 100 (from default_process_limit=100) and I find these errors in the logs: Sep 25 15:32:24 imap(info@xxxx), session=<z9N2SDXnIQCy71XC>: Error: read(/usr/local/dovecot-2.1/var/run/dovecot/dict) failed: Connection reset by peer Sep 25 15:32:24 imap(service@xxxx), session=<xKxSSDXnwABb/1Ql>: Error: read(/usr/local/dovecot-2.1/var/run/dovecot/dict) failed: Connection reset by peer or Sep 25 15:33:48 imap(info@xxxx), session=<M8FITTXnwABb/CM9>: Warning: read(/usr/local/dovecot-2.1/var/run/dovecot/dict): dict lookup took 5 seconds Sep 25 15:33:48 imap(editoria@xxxx), session=<3LpHZTTnDgBdJwmm>: Warning: read(/usr/local/dovecot-2.1/var/run/dovecot/dict): dict lookup took 5 seconds Do you think will be better set: service dict { service_count = 0 or default_process_limit=200 (instead of 100) Thanks -- Alessio Cecchi is: @ ILS -> http://www.linux.it/~alessice/ on LinkedIn -> http://www.linkedin.com/in/alessice Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz/ @ PLUG -> ex-Presidente, adesso senatore a vita, http://www.prato.linux.it

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[Dovecot] proxy: get rid of redundant log-informations
by Reindl Harald 25 Sep '13

25 Sep '13

Hi login_log_format_elements = user=<%u> method=%m rip=%r %k is it possible to get rid of the "proxy(test(a)testserver.rhsoft.net): started proxying to 127.0.0.1:143: " part because on a proxy-only server i know that and it is explicitly not listed in "login_log_format_elements" as well as for the "TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA" it would be enough "TLSv1 DHE-RSA-CAMELLIA256-SHA" the reason is simple: * all needed informations are present * smaller logfiles * nicer "tail -f" on the syslog without breaks _____________________________________________ Aug 14 16:31:46 testserver dovecot: imap-login: proxy(test(a)testserver.rhsoft.net): started proxying to 127.0.0.1:143: user=<test(a)testserver.rhsoft.net>, method=CRAM-MD5, rip=91.118.73.99, TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)

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[Dovecot] unable to lock for exclusive access: Resource temporarily unavailable
by Nikos Papadopoulos 25 Sep '13

25 Sep '13

Dears, We have a mail server (RHEL 6.0, Postfix and Dovecot 1.0.7). The output of dovecot -n is the following: # 1.0.7: /etc/dovecot.conf protocols: pop3 login_dir: /var/run/dovecot/login login_executable: /usr/libexec/dovecot/pop3-login mail_location: mbox:~/mail:INBOX=/var/mail/%u mail_executable: /usr/libexec/dovecot/pop3 mail_plugin_dir: /usr/lib/dovecot/pop3 pop3_client_workarounds: outlook-no-nuls oe-ns-eoh auth default: passdb: driver: pam userdb: driver: passwd During the last days we face the following problem: There is great delay in the delivery of the emails. Some seem to not be delivered at all. Issuing the mailq command we get the following message for almost all the email accounts: (cannot update mailbox /var/mail/xyz for user xyz. unable to lock for exclusive access: Resource temporarily unavailable) Please send to me any suggestions, because I cannot resolve it and I receive a lot of pressure. Best Regards, Nikos

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[Dovecot] (no subject)
by Greg Ryman 25 Sep '13

25 Sep '13

Hello, I've been out of the sysadmin game for some time and I've recently setup a mail server. Everything is working except for the quota, which I believe is likely an error in how I'm using my SQL queries. Any guidance, pointers, or advice would be greatly appreciated. root@mail:/etc/dovecot/conf.d# dovecot -n # 2.0.19: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-042stab079.6 x86_64 Ubuntu 12.04.3 LTS reiserfs auth_mechanisms = plain login dict { sqldomainquota = mysql:/etc/dovecot/dovecot-sql-domain.conf sqluserquota = mysql:/etc/dovecot/dovecot-dict-sql-user.conf } first_valid_uid = 150 last_valid_uid = 150 mail_gid = mail mail_location = maildir:/var/vmail/%d/%n mail_plugins = quota mail_uid = vmail 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 passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { antispam_allow_append_to_spam = YES antispam_backend = dspam antispam_dspam_args = --user;%u;--deliver=;--source=error antispam_dspam_binary = /usr/bin/dspam antispam_dspam_notspam = --class=innocent antispam_dspam_result_header = X-DSPAM-Result antispam_dspam_spam = --class=spam antispam_signature = X-DSPAM-Signature antispam_signature_missing = error antispam_spam = Spam;Junk antispam_trash = trash;Trash autocreate = Trash autocreate2 = Junk autocreate3 = Sent autocreate4 = Drafts autocreate5 = Archive quota = dict:User Quota::proxy::sqluserquota quota_rule2 = Trash:storage=+10%% sieve = ~/.dovecot.sieve sieve_after = /etc/sieve/conf.d/after sieve_before = /etc/sieve/conf.d/before sieve_dir = ~/sieve } postmaster_address = admin(a)gryman.com protocols = " imap sieve pop3" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { group = mail mode = 0600 user = vmail } } service dict { unix_listener dict { mode = 0600 user = vmail } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = " sieve autocreate quota" } protocol lda { mail_plugins = sieve quota } protocol imap { mail_plugins = quota antispam autocreate quota imap_quota } root@mail:/etc/dovecot# grep -v '^ *$#.*$\?$' dovecot-sql.conf driver = mysql connect = host=localhost dbname=mail user=mail password=mailpassword default_pass_scheme = MD5-CRYPT password_query = \ SELECT username as user, password, '/var/vmail/%d/%n' as userdb_home, \ 'maildir:/var/vmail/%d/%n' as userdb_mail, 150 as userdb_uid, 8 as userdb_gid \ FROM mailbox WHERE username = '%u' AND active = '1' user_query = \ SELECT '/var/vmail/%d/%n' as home, 'maildir:/var/vmail/%d/%n' as mail, \ 150 AS uid, 8 AS gid, concat('dirsize:storage=', quota) AS quota \ FROM mailbox WHERE username = '%u' AND active = '1' root@mail:/etc/dovecot# tail -n 8 /etc/postfix/master.cf # DSPAM dspam unix - n n - 10 pipe flags=Ru user=dspam argv=/usr/bin/dspam --deliver=innocent,spam --user $recipient -i -f $sender -- $recipient # Integration with Dovecot - hand mail over to it for local delivery, and # run the process under the vmail user and mail group. dovecot unix - n n - - pipe flags=DRhu user=vmail:mail argv=/usr/lib/dovecot/dovecot-lda -d $(recipient) -- Greg Ryman

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[Dovecot] 2048-bit Diffie-Hellman parameters
by Marios Titas 25 Sep '13

25 Sep '13

Currently, dovecot generates two primes for Diffie-Hellman key exchanges: a 512-bit one and a 1024-bit one. In light of recent events, I think it would be wise to add support for 2048-bit primes as well, or even better, add a configuration option that lets the user select a file (or files) containing the DH parameters In recent years, there has been increased interest in DH especially in its ephemeral version (DHE) because it provides perfect forward secrecy. In that context, the use of 1024-bit parameters might not seem such a terrible idea: if someone cracks the ephemeral key then they will only gain access to the data exchanged during that particular session. Therefore, it might not be worth the effort to crack such a key. But this is certainly not the case for IMAPS: it is quite likely that the session data will include the user's credentials.

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[Dovecot] Delete to Archive?
by James E. Pace 25 Sep '13

25 Sep '13

Hi, I recently switched from being a Gmail user to running Dovecot [2.1.10] on my server. Thank you for an easy to use piece of software that solves problems! I am trying (unsuccessfully) to replicate something from GMail. When I delete a message on my iPhone (or other client), I would like to have it moved to an "All Mail" or Archive folder, instead of actually deleting it. Is this possible? Thanks, James

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[Dovecot] Apple IOS 7 Mail APP uses multi body searches by default
by Urban Loesch 25 Sep '13

25 Sep '13

Hi, today we found this blogpost: http://blog.fastmail.fm/2013/09/17/ios-7-mail-app-uses-multi-folder-body-se… Have you any idea if this could impact performance of dovecot using mdbox format with 10MB per file size and zlib enabled? Thanks and regards Urban Loesch

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