- dovecot - dovecot.org

Awfully slow dovecot
by Robin Helgelin 26 Dec '14

26 Dec '14

Hi, We’re using dovecot 1.0.7, which seems to be the latest version available on CentOS 5. Downloading emails are dead slow. Really small emails goes quickly, but normal emails and emails with attachments are so slow to download it’s almost ridiculous. I’ve googled some and found that it could be related to quota, but I disabled the quota plugins on imap with no difference. dovecot -n: # 1.0.7: /etc/dovecot.conf ssl_cert_file: /etc/dovecot/cert.pem ssl_key_file: /etc/dovecot/key.pem disable_plaintext_auth: yes verbose_ssl: yes login_dir: /var/run/dovecot/login login_executable(default): /usr/libexec/dovecot/imap-login login_executable(imap): /usr/libexec/dovecot/imap-login login_executable(pop3): /usr/libexec/dovecot/pop3-login valid_chroot_dirs: /var/mail/domains verbose_proctitle: yes last_valid_uid: 500 mail_location: maildir:/var/mail/domains/%d/%n/mail mail_executable(default): /usr/libexec/dovecot/imap mail_executable(imap): /usr/libexec/dovecot/imap mail_executable(pop3): /usr/libexec/dovecot/pop3 mail_plugins(default): mail_plugins(imap): mail_plugins(pop3): quota mail_plugin_dir(default): /usr/lib/dovecot/imap mail_plugin_dir(imap): /usr/lib/dovecot/imap mail_plugin_dir(pop3): /usr/lib/dovecot/pop3 auth default: mechanisms: plain login passdb: driver: ldap args: /etc/dovecot/dovecot-ldap.conf userdb: driver: ldap args: /etc/dovecot/dovecot-ldap.conf socket: type: listen client: path: /var/spool/postfix/private/auth mode: 384 user: postfix group: postfix master: path: /var/run/dovecot/auth-master mode: 384 user: vmail group: mail plugin: convert_mail: maildir:/var/mail/domains/%d/%u/mail dovecot-ldap.conf: auth_bind = yes hosts = example.com ldap_version = 3 base = o=hosting,dc=example,dc=com dn = cn=phamm,o=hosting,dc=example,dc=com dnpass = password pass_attrs = mail pass_filter = (&(objectClass=VirtualMailAccount)(accountActive=TRUE)(mail=%u)) user_attrs = mail,,,mail,,,quota=quota=maildir:storage user_filter = (&(objectClass=VirtualMailAccount)(accountActive=TRUE)(mail=%u)) deref = never scope = subtree default_pass_scheme = MD5 user_global_uid = 500 user_global_gid = 12

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Curious dovecot behavior with service_count = 0
by anon_user＠openmailbox.org 26 Dec '14

26 Dec '14

Hello, I'm not experiencing this problem at all with service_count = 1 With service_count = 0, this is what I got randomly in my logs: TLS: SSL_read() syscall failed: Connection reset by peer To be successfully logged, the user have to initiate a new connection. I primary thought about vsz_limit but I've put this value to 10GB (yes this is very overkill, that was just for the test) and that don't change anything. I use the lastest version of dovecot. Any ideas ? Thanks.

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Re: Maildir permissions on creation?
by Von Random 26 Dec '14

26 Dec '14

The main reason is that I don't want to provide backup user with unnecessary write permissions within maildirs and mail user within backup logs dir. I was talking about mail_user:mail_group 0750 on dirs and 0640 on files. (Or, possibly, mail_user:backup_group 2750 and 2640.) 26.12.2014, 11:19, "Tobi" <tobster(a)brain-force.ch>: > Whats the reason you do not want to use default dovecot user. Your idea would assume that at least the group must have write access. For me a no-go on mailboxes. > > Am 24. Dezember 2014 13:21:15 MEZ, schrieb Von Random <von(a)vdrandom.org>: >> Hello. >> >> In my configuration dovecot reads home from mysql and uses no variables >> within it. It uses Maildir++ storage with virtual users. I also happen >> to use LMTP. >> >> I want to use a backup solution that does not involve running itself as >> root. Neither do I want to run it as dovecot's mail user. >> >> And there lies the problem: dovecot creates maildirs with 0700 and >> files within them inherit that set of permissions. And there seems to >> be no sane way to control it. I think I've figured out what to patch in >> order to change that default, but if possible, I'd like to avoid doing >> that. >> >> tl;dr: is it possible to change the default set of permissions for new >> maildirs created by dovecot? > > - -- > Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet. >> -----BEGIN PGP SIGNATURE----- >> Version: APG v1.1.1 >> >> iQI7BAEBCgAlBQJUnRoiHhxUb2JpIDx0b2JzdGVyQGJyYWluLWZvcmNlLmNoPgAK >> CRA1HOYlqGik5L9iD/9FIE2JzWfB7fWJEbI3vVg+ar4LRGwW1xNIf8ahlytPbsmH >> D9dFP3kWpJH6TO41AksNjz/FxHcUqSrlsKYTFUsDZCyb9Zyxd8Jv+dH04FwUzw+y >> kq+ayoylnTN7Q8mQnqkUpWEuYd5ohWbbUUSguwzN8Zd1T4jCFR9/Lvu0cweE6meu >> mBGwvXBbfBP4El+mAM2lKnoMXQpMycS6aX7FwQ/fBaoWSkzg/2az69UtqG6LLF67 >> ZhJkbn17cpT3y/l/2nV5urdcFVh8RoSXNuYyMN4r7IDKQ6BPsneD+839LS9X/gP/ >> QMuo5nO5xdx4q1bT9gtv1zz5eKAJ1f3R2oPZyxdpiV5PruSY3J3kvu0cF0aJvQF6 >> +s0iDsoDBcueB6JEUnYAarteWvBvxRnqb8ytju1xbIEkKLZtaS8Gf2cpZ8eA+Ha/ >> D0zkYfq7bt+Ra7BY6Qh7XMfiN5z9eWe5RqOmVLZRLf9N75U6wWa+fmXpvlqEtGNV >> pKsgif/ivCHiA24+JSJ1PBRjwO36Tu4MsSlT2WnkvyFBQzFzg9T00fl+uTXzgNEz >> SBta2wmXk9XVJ9mPzfNrAaAA3+T6H90Sj1CbRt7NZx30UdwYoIL5XXEtnG0p1XdS >> moe91H2UE+NT+jgj7emAOLxJf86vIwiHCqI0Zl/7wVNJEnKBXJP5WIHcdEDEHg== >> =Tl/z >> -----END PGP SIGNATURE-----

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doveadm pw generates different hash each time it is invoked !?
by reik red 26 Dec '14

26 Dec '14

I am absolutely dumbfounded by "doveadm pw". My understanding is that the command should be used to create a hashed password that should in turn be placed into /etc/dovecot/passwd Here comes the "dumbfounded" part. I was creating a new virtual user, running doveadm pw to generate the hashed password. But when I tried to login via imap, the password was rejected. So I started checking that I had populated /etc/dovecot/passwd with the correct values, and in the process I ran "doveadm pw" again to make certain I had not accidentally pasted the wrong value along with a username. (I'm re-submittting after setting up a subscription, so I don't have to wait for the moderator) , What happened next surprised me greatly: if I specify "-s ssha", the resulting hashed password changes each time I invoke "doveadm pw", but if I do not specify the hashing method, I get the same password each time (as I expect). What on earth is going on here? There must be something fundamental that I am missing. ============================================== Illustrative example: machine(user) 6136 > doveadm pw -u joebob Enter new password: Retype new password: {CRAM-MD5}00747cf2ffaf11c5ea4a64979c3901fc1d20dee13f480bb598f7d8575b23e61b machine(user) 6137 > doveadm pw -u joebob Enter new password: Retype new password: {CRAM-MD5}00747cf2ffaf11c5ea4a64979c3901fc1d20dee13f480bb598f7d8575b23e61b #SAME, as expected machine(user) > doveadm pw -u glorg Enter new password: Retype new password: {CRAM-MD5}00747cf2ffaf11c5ea4a64979c3901fc1d20dee13f480bb598f7d8575b23e61b #another surprising behavior: The (virtual) username specified does not affect the hash!!! machine(user) 6138 > doveadm pw -u joebob -s ssha Enter new password: Retype new password: {SSHA}AtjINkQra967qIhU6khRED4U1x3aKwDi machine(user) 6139 > doveadm pw -u joebob -s ssha Enter new password: Retype new password: {SSHA}fZiFlHPKDn6ESM/gnUIcjJ14hRlH10DV # DIFFERENT, very unexpected ============================================== I'm on fedora 19, using dovecot.x86_64 version 1:2.2.15-1.fc19 per yum.

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Dovecot-ee
by Davide 25 Dec '14

25 Dec '14

Hi to all, i found that dovecot-ee repository access is free 0,00 $ cost; i'm running dovecot community 2.2.13 can i migrate my system to dovecot-ee? What are difference between Dovecot-ee and Dovecot-community? -- *Davide Marchi* *T*eorema *F*errara *Srl* Via Spronello, 7 - Ferrara - 44121 Tel. *0532783161* Fax. *0532783368* E-m@il: *davide.marchi(a)mail.cgilfe.it* Skype: *davide.marchi73* Web: *http://www.cgilfe.it* *CONFIDENZIALITA'* *Ai sensi del D.Lgs. 196/2003 si precisa che le informazioni contenute in questo messaggio sono riservate ed a uso esclusivo del destinatario/dei destinatari. Qualora il messaggio in parola Le fosse pervenuto per errore, La invitiamo ad eliminarlo senza copiarlo e a non inoltrarlo a terzi, dandocene gentilmente comunicazione.* *Per favore, pensa all'ambiente. Stampa questa email solo se necessario.*

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director + lmtp + ldap user
by Lazy 25 Dec '14

25 Dec '14

Hi, recently I have migrated our prevoius dovecot-lda to 2.2 with director + lmtp. And we are having some issues. When lmtp delivers to ldap uid names everything works except sieve vacation (login is not found in headers so reply is not sent). When using full email addresses in rcpt to vacation works but usernames are inconsistent (one user can login using his email address, or aliases, or uid). To fix that in ldap settings a have added uid=user which should be setting the username to approperate values. Most of the times it works but some deliveries are using email addresses not ldap uid's which seems to break dict quota's. It's must be related to auth cache (flushing the cache fixes the issue temporarly for given account). I think that the cache can be "polluted" by some other dovecot service. Does anyone have an idea where this can be comming from ? doveadm auth lookup -f user mon(a)test.com returns expected ldap uid no email address Thanks in advance for any help. Michal Grzedzicki from dovecot-ldap.conf.ext from backends user_attrs = uid=user, mailMessageStore=home, mailQuotaSize=quota_rule=*:bytes=%$ user_filter = (&(&(!(accountStatus=deleted))(objectClass=qMailUser))(|(mail=%u)(uid=%u)(mailAlternateAddress=%u))) pass_attrs = uid=user,userPassword=password pass_filter = (&(objectClass=qMailUser)(|(mail=%u)(uid=%u)(mailAlternateAddress=%u))) iterate_attrs = uid=user iterate_filter = (&(&(objectClass=qmailUser)(!(accountStatus=deleted)))) director is doing the authorization and passing it to the backend using a master user protocol lmtp { passdb { args = proxy=y nopassword=y port=24 } } backend doveconf -n # 2.2.15: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.7 auth_cache_negative_ttl = 5 mins auth_cache_size = 10 M auth_cache_ttl = 5 mins auth_debug = yes auth_master_user_separator = * auth_mechanisms = plain login auth_username_format = %u auth_verbose = yes base_dir = /var/run/dovecot/ deliver_log_format = msgid=%m f:%f s:%s %$ disable_plaintext_auth = no first_valid_gid = 300 first_valid_uid = 300 import_environment = TZ last_valid_gid = 300 last_valid_uid = 300 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes lda_original_recipient_header = Delivered-To login_greeting = Imap ready. mail_debug = yes mail_gid = 300 mail_location = maildir:~/Maildir:INDEX=/var/dovecot_indexes%h mail_plugins = quota expire notify mail_log mail_uid = 300 maildir_very_dirty_syncs = yes 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 duplicate namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox SPAM { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/master-users driver = passwd-file master = yes pass = yes } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { expire = SPAM expire_dict = redis:host=127.0.0.1:prefix=expire/ mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid from subject size quota = dict:User quota::redis:host=127.0.0.1:prefix=user/ quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve_global_dir = /etc/sieve_global sieve_max_redirects = 20 } postmaster_address = postmaster(a)iq.pl protocols = imap pop3 lmtp sieve recipient_delimiter = service auth { unix_listener auth-userdb { mode = 0777 } } service dict { unix_listener dict { group = vmail user = vmail } } service doveadm { inet_listener { port = 2424 } } service imap-login { process_min_avail = 8 service_count = 0 } service imap { process_limit = 14000 } service lmtp { inet_listener lmtp { address = dovecot1 port = 24 } process_min_avail = 5 user = vmail } service managesieve-login { inet_listener sieve { address = 0.0.0.0 port = 4090 } protocol = sieve } service pop3-login { process_min_avail = 8 service_count = 0 } service pop3 { process_limit = 10000 } service quota-warning { executable = script /usr/local/bin/quota_warning.sh unix_listener quota-warning { user = vmail } user = vmail } ssl = no syslog_facility = local2 userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } verbose_proctitle = yes protocol lmtp { auth_username_format = %u info_log_path = /var/log/dovecot-lmtp mail_plugins = quota expire notify mail_log sieve syslog_facility = local3 } protocol lda { mail_plugins = quota expire notify mail_log sieve syslog_facility = local3 } protocol imap { mail_max_userip_connections = 30 mail_plugins = quota expire notify mail_log imap_quota }

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Maildir permissions on creation?
by Von Random 24 Dec '14

24 Dec '14

Hello. In my configuration dovecot reads home from mysql and uses no variables within it. It uses Maildir++ storage with virtual users. I also happen to use LMTP. I want to use a backup solution that does not involve running itself as root. Neither do I want to run it as dovecot's mail user. And there lies the problem: dovecot creates maildirs with 0700 and files within them inherit that set of permissions. And there seems to be no sane way to control it. I think I've figured out what to patch in order to change that default, but if possible, I'd like to avoid doing that. tl;dr: is it possible to change the default set of permissions for new maildirs created by dovecot?

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Configuring LMTP/IMAP proxy
by Le Moing, Guenhaël 23 Dec '14

23 Dec '14

Hi, First, my version: [root@centos1 conf.d]# dovecot --version 2.2.15 [root@centos1 conf.d]# I have already configured dovecot that way (on one single VM, so everythinh is stored on the same machine) - A post fix server sending out to LMTP - LMTP is the dovecot LMTP server, configured with "lmtp-proxy= no", - LMTP checks the users receiving messages by using Linux passwd file "userdb" section in auth-passwdfile.conf.ext, - IMAP LOGINS are authenticated using DIGEST-MD5 also configured in auth-passwdfile.conf.ext : - # Authentication for passwd-file users. Included from 10-auth.conf. # # passwd-like file with specified location. # <doc/wiki/AuthDatabase.PasswdFile.txt> passdb { driver = passwd-file args = scheme=DIGEST-MD5 username_format=%n /etc/dovecot/users.DIGEST-MD5 #args = scheme=CRAM-MD5 username_format=%n /etc/dovecot/users.CRAM-MD5 } userdb { driver = passwd # Default fields that can be overridden by passwd-file #default_fields = quota_rule=*:storage=1G default_fields = uid=root gid=root home=/home/%n # Override fields from passwd-file #override_fields = home=/home/virtual/%u } This works fine, I can send messages through SMTP, and read them using IMAP access. But now, I woukd like to have amore structured architecture with : - A LMTP server configured as PROXY : has to identify the user, and proxy the request to the backen LMTP server (where its mailbox will stand) - On backend, I also have to start another LMTP serevr, but not configured in proxy mode of course, - Same for IMAP : IMAP proxy first checking LOGIN credentials, and then forwarding to IMAP server running on backend. As a first step, I would like to continue using my files to authenticate uses (so passwd file , and users.DIGEST-MD5), but final goal will be using a MySQL DB. So my main question are : 1) I just made a test and changed "lmtp_proxy" to "yes" in my 20_lmtp.cong file, but, strangely, this did not cah nge anything ! The LMTP process still receives mails and stores them on the local host , 2) Are there any documentation describing this process in details ? I only found some pieces on wiki pages, but not enough unfortunately ... 3) Are there some configuratiion files ready to use for my configuration. Thanks in advance. Cordialement. Guenhaël. This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.

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zlib, mdbox and spam filtering scripts
by Philon 23 Dec '14

23 Dec '14

Hi all, I am quite happily running a dovecot setup with maildirs. This was once running courier but since the migration I have never ever looked back. Now, with growing userbase I’m looking into using zlib compression and mdbox instead of maildir. This seems to go quite well using dsync on a testbed server. So let’s go production! Before final decision I came across this: - I’m using a spam learning address, where users forward their mails to train SpamAssassin. - there is a cron script on the server, mime-stripping the attachments and feeding them into SA - works quite well even for the still numerous POP users So well… compression ok, I could add a gunzip into the script and go from there. But mdbox seems only accessible via dovecot. I don’t think that accessing via IMAP makes sense for a local script. So I would block myself out when using mdbox. How are your spam/ham training routines? How do you feed SA? thank you! Philon

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error: iostream-ssl.h: No such file or directory
by Tobi 22 Dec '14

22 Dec '14

Hi list I'm trying to build dovecot 2.2.15 from source on a debian wheezy (64bit). As I wanted to get starttls support for dovecot's lmtp I got the patched files from here: http://hg.dovecot.org/dovecot-2.2/rev/297192cfbd37 My ./configure ./configure --prefix=/usr/local/dovecot-test --with-solr --with-mysql --with-sql --without-shadow --without-pam configure seems to run fine but the following make ends up in client.c:17:26: fatal error: iostream-ssl.h: No such file or directory compilation terminated. make[3]: *** [client.o] Error 1 make[3]: Leaving directory `/usr/local/src/dovecot-2.2.15/src/lmtp' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/usr/local/src/dovecot-2.2.15/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/usr/local/src/dovecot-2.2.15' make: *** [all] Error 2 Any ideas what I'm missing? libssl-dev is installed via apt Thanks for any idea Cheers tobi

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