July 2010 - dovecot - dovecot.org

[Dovecot] using Lazy_Expunge to enforce retention policy
by Jim Salter 26 Jul '10

26 Jul '10

Hi, I've been experimenting with using Lazy_Expunge as a tool to enforce document retention policies (by keeping users from deleting emails forever, instead expiring them after a set time). My problem is, how do I keep the user from deleting/expunging mails *inside the expunge folder itself*? I am using dovecot-1.2.10 built from FreeBSD's ports tree, and I am using the following settings for the "expunged" folder of Lazy_Expunge, as part of the "three namespaces" approach suggested in the wiki: # namespaces for lazy_expunge plugin: namespace private { prefix = .EXPUNGED/ separator = / location = maildir:/usr/local/vpopmail/domains/%d/%n/EXPUNGED } When a user expunges mail, it shows up in the folder listed just fine. But if the user expunges mail from /that/ folder, it's gone forever, which defeats the purpose in regard to "enforcing retention." As a partial workaround, I tried adding hidden=yes and list=no to the setting, and restarting dovecot: # namespaces for lazy_expunge plugin: namespace private { prefix = .EXPUNGED/ separator = / location = maildir:/usr/local/vpopmail/domains/%d/%n/EXPUNGED hidden = yes list = no } The problem is, while this does indeed *hide* the namespace from the user, it doesn't prevent them from *using* it if they know about it - I discovered this because Thunderbird still "remembered" the namespace from before I hid it; experimenting confirmed that, yes, I could still use Thunderbird to go into my expunged folder and permanently delete any email in it. If I remove the account from Thunderbird *completely* and reset it up from scratch, I can no longer "see" the namespace - but that's weak security at best, as I can still manually navigate to it and wreak havoc. How can I use Lazy_Expunge to completely PREVENT users from deleting email permanently? Thank you!

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[Dovecot] Dovecot 2 and expire
by Brandon Lamb 26 Jul '10

26 Jul '10

expire_dict = proxy::expire I found this expire_dict somewhere, might have been the 1.x wiki, but on the expire plugin page there is no mention of it. I am trying to troubleshoot why my mysql table has no entries. Do I need this line? Is that correct for using mysql? In dict {} I have expire = mysql:/etc/dovecot/conf.d/dovecot-dict-expire.conf.ext and in plugin {} i have expire_dict = proxy::expire expire = Trash 30d expire2 = Trash/* 30d expire3 = Spam 14d expire4 = Spam/Removed 6h expire5 = Spam/Delivered 2d expire6 = Deleted* 30d expire7 = Archive 30d Contents of dovecot-dict-expire.conf.ext connect = host=servername dbname=mail user=un password=pw map { pattern = shared/expire/$user/$mailbox table = expires value_field = ts_expires fields { username = $user mailbox = $mailbox } } I must admit I dont understand what pattern means, I just copied from something when I was setting this up.

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[Dovecot] Dsync error when working dir o-rwx
by Jan Vítek 26 Jul '10

26 Jul '10

Hi, I dont know why dsync requires o+rx in working dir, at least it could give better error message when working dir has o-rwx. # cd # mkdir test # cd test # dsync -D -v -u 'info(a)example.org' -o 'mail_privileged_group=mail' -o 'mail_location=mbox:/email/info@example.org/mail:INBOX=/var/mail/info@example.org' mirror 'maildir:~/Maildir' dsync(info(a)example.org): Info: Sport: only in source dsync(info(a)example.org): Info: INBOX: only in source # cd # mkdir test # chmod o-rwx test # cd test # dsync -D -v -u 'info(a)example.org' -o 'mail_privileged_group=mail' -o 'mail_location=mbox:/email/info@example.org/mail:INBOX=/var/mail/info@example.org' mirror 'maildir:~/Maildir' dsync(info(a)example.org): Info: Sport: only in source dsync(info(a)example.org): Info: INBOX: only in source dsync(info(a)example.org): Error: open(.) failed: Permission denied dsync(info(a)example.org): Error: open(.) failed: Permission denied dsync(info(a)example.org): Panic: file mbox-sync-rewrite.c: line 247 (mbox_sync_try_rewrite): assertion failed: (sync_ctx->mbox->mbox_lock_type == F_WRLCK) dsync(info(a)example.org): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0 [0x7f9fbc8489f2] -> /usr/lib/dovecot/libdovecot.so.0(default_fatal_handler+0x37) [0x7f9fbc848ae7] -> /usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f9fbc848e03] -> /usr/lib/dovecot/libdovecot-storage.so.0(mbox_sync_try_rewrite+0x255) [0x7f9fbcb0c7b5] -> /usr/lib/dovecot/libdovecot-storage.so.0 [0x7f9fbcb1506a] -> /usr/lib/dovecot/libdovecot-storage.so.0 [0x7f9fbcb15a30] -> /usr/lib/dovecot/libdovecot-storage.so.0(mbox_sync+0x46) [0x7f9fbcb16846] -> /usr/lib/dovecot/libdovecot-storage.so.0 [0x7f9fbcb10701] -> dsync [0x410729] -> dsync(dsync_worker_update_mailbox+0x32) [0x40ee32] -> dsync(dsync_brain_sync+0xc6b) [0x40892b] -> dsync(dsync_brain_sync_all+0x18) [0x408d48] -> dsync(main+0x536) [0x4070a6] -> /lib/libc.so.6(__libc_start_main+0xe6) [0x7f9fbc0cd1a6] -> dsync [0x406989] Aborted Kind Regards Jan Vítek ČESKÝ WEBHOSTING s.r.o. Tel: +420 605 25 25 25 http://www.cweb.cz

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[Dovecot] Dovecot and LDAP - virtual hosting problem
by Pavel Dimow 26 Jul '10

26 Jul '10

Hello, I have a small ISP and we have a dovecot for virtual mail hosting with a postfix and openldap as backend. Now the problem is that there is one primary domain (example.com) and many other virtual domains with different users. When user from primary domain logs in, he is using username as his username (without domain part) and when user from virtual domain logs in, he uses username@virtualdomain as his username. I don't know how to make dovecot-ldap.conf to authenticate both users from the same ldap tree. My ldap tree is organized like: ou=people,o=example.com,dc=acme ou=people,o=somevirtdomain.cp,dc=acme and so on... The only one thing that comes on my mind is something like (default domain) in dovecot.conf (if %d is empty then %d=examle.com, othewise...) I know this option does not exist but is just comes on my mind... Maybe some specific filter_search or something like that? Than you for any help in advance.

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[Dovecot] Flagged message
by Piyush Joshi 26 Jul '10

26 Jul '10

Dear All, Is it possible to show all flagged message in separate folder and if i remove the same message from the flagged folder it only removes the flag ? Thanks

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[Dovecot] Permanent delete from Spam folder
by Piyush Joshi 26 Jul '10

26 Jul '10

Dear All, I want that if someone delete the mail from SPAM folder mail must be deleted permanently instead of moving the same to Trash folder. Is it possible with the dovecot right now ? Please let me know the solution for the same. Thanks

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[Dovecot] Problem with hard links in lda - please help
by Fabio Ferrari 26 Jul '10

26 Jul '10

Hello, I'm trying to enable hardlinks for messages sent to mutiple users. (I need this because I have mailing lists with 5000 users used many times a day). I've read that, to do this, I have to write a script that uses the /usr/local/libexec/dovecot/deliver command in this way: deliver -p <FILE> -d <USER1> -d <USER2> Of course, I enabled the "socket listen" option in the configuration file to get the command line work, and set the maildir_copy_with_hardlinks = yes The deliver command works, so I have the messages correctly in the "new" directory in the maildir folder. But if I list the files, they have the "links" number = 1, so I see that the file was copied, not hardlinked! I see in the page http://wiki.dovecot.org/LDA that is possible, in fact it says Parameters [...] -p <path>: Path to the mail to be delivered instead of reading from stdin. If using maildir the file is hard linked to the destination if possible. This allows a single mail to be delivered to multiple users using hard links, but currently it also prevents deliver from updating cache file so it shouldn't be used unless really necessary. (v1.1+) Of course, I use a version 1.1+ (1.2.12). Please help, thanks in advance Fabio Ferrari

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[Dovecot] script to extract From: addresses
by Iv Ray 26 Jul '10

26 Jul '10

Hello, For my manager I need to write a script to extract the From: e-mail addresses from his e-mail account. Then they are sent invitations to join our mailing list(s). I inherited this Dovecot server, I have not done anything with Dovecot before. Could you give me some direction on if/how can this be done? We run Dovecot 1.0.1 (dovecot --version) Thank you, Iv

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[Dovecot] antispam plugin troubleshooting
by Bradley Giesbrecht 26 Jul '10

26 Jul '10

I built the dovecot antispam plugin and renamed it so I could have multiple backends installed at the same time. http://johannes.sipsolutions.net/Projects/dovecot-antispam I tried recompiling antispam without renaming the .so and I get the same result indicated below. All other plugins and the system as a whole has been functioning normally. Only when I add antispam plugin does dovecot not start and perform as expected. What can I do to find the reason dovecot is not loading lib90_antispam_mailtrain_plugin.so successfully? Below is some info I could think to supply for help. Regards, Bradley Giesbrecht Mac OS X 10.5.8 dovecot antispam plugin 1.3 bash-3.2# tail -f /var/log/system.log | grep dovecot Jul 25 13:51:07 trex org.macports.dovecot[10354]: ^AILoading modules from directory: /opt/local/lib/dovecot/imap Jul 25 13:51:07 trex org.macports.dovecot[10354]: ^AIModule loaded: / opt/local/lib/dovecot/imap/lib20_autocreate_plugin.so Jul 25 13:51:08 trex org.macports.dovecot[10354]: Error: imap dump- capability process killed with signal 11 Jul 25 13:51:08 trex org.macports.dovecot[10354]: Fatal: Invalid configuration in /opt/local/etc/dovecot/dovecot.conf bash-3.2# file /opt/local/lib/dovecot/imap/ lib90_antispam_mailtrain_plugin.so /opt/local/lib/dovecot/imap/lib90_antispam_mailtrain_plugin.so: Mach-O executable ppc bash-3.2# dovecot --version 1.2.11 bash-3.2# dovecot -n # 1.2.11: /opt/local/etc/dovecot/dovecot.conf # OS: Darwin 9.8.0 Power Macintosh hfs log_path: /opt/local/var/serveza/log/mail/dovecot.log protocols: imap imaps pop3 pop3s managesieve listen(default): * listen(imap): * listen(pop3): * listen(managesieve): *:2000 disable_plaintext_auth: no login_dir: /opt/local/var/run/dovecot/login login_executable(default): /opt/local/libexec/dovecot/imap-login login_executable(imap): /opt/local/libexec/dovecot/imap-login login_executable(pop3): /opt/local/libexec/dovecot/pop3-login login_executable(managesieve): /opt/local/libexec/dovecot/managesieve- login mail_max_userip_connections: 30 mail_location: dbox:/opt/local/var/serveza/mail/%d/%n/dbox mail_debug: yes mail_executable(default): /opt/local/etc/dovecot/bin/log_imap_login.sh mail_executable(imap): /opt/local/etc/dovecot/bin/log_imap_login.sh mail_executable(pop3): /opt/local/etc/dovecot/bin/log_pop3_login.sh mail_executable(managesieve): /opt/local/libexec/dovecot/managesieve mail_plugins(default): autocreate antispam_mailtrain mail_plugins(imap): autocreate antispam_mailtrain mail_plugins(pop3): mail_plugins(managesieve): mail_plugin_dir(default): /opt/local/lib/dovecot/imap mail_plugin_dir(imap): /opt/local/lib/dovecot/imap mail_plugin_dir(pop3): /opt/local/lib/dovecot/pop3 mail_plugin_dir(managesieve): /opt/local/lib/dovecot/managesieve lda: postmaster_address: postmaster(a)pixilla.com hostname: ix.databoost.com sendmail_path: /opt/local/sbin/sendmail auth_socket_path: /opt/local/var/run/dovecot/auth-master log_path: /opt/local/var/serveza/log/mail/dovecot-deliver.log mail_plugins: sieve auth default: mechanisms: plain login cram-md5 ntlm apop debug: yes passdb: driver: sql args: /opt/local/etc/dovecot/dovecot_mysql.conf userdb: driver: prefetch userdb: driver: sql args: /opt/local/etc/dovecot/dovecot_mysql.conf socket: type: listen client: path: /opt/local/var/spool/postfix/private/auth mode: 432 user: _postfix group: _postfix master: path: /opt/local/var/run/dovecot/auth-master mode: 384 user: _vmail plugin: sieve_before: /opt/local/var/serveza/mail/filter/sieve/global/before/ sieve: /opt/local/var/serveza/mail/filter/sieve/%d/%n/active.sieve sieve_global_path: /opt/local/var/serveza/mail/filter/sieve/global/ default.sieve sieve_dir: /opt/local/var/serveza/mail/filter/sieve/%d/%n/sieve sieve_global_dir: /opt/local/var/serveza/mail/sieve/global/include/ sieve_after: /opt/local/var/serveza/mail/filter/sieve/global/after/ autocreate: Trash autocreate2: Spam autosubscribe: Trash autosubscribe2: Spam antispam_mailtrain_signature: X-DSPAM-Signature antispam_mailtrain_signature_missing: error antispam_mailtrain_trash_pattern_ignorecase: trash;Deleted * antispam_mailtrain_spam_pattern_ignorecase: SPAM*;Junk* antispam_mailtrain_dspam_binary: /opt/local/bin/dspam antispam_mailtrain_mail_tmpdir: /tmp antispam_mailtrain_mail_sendmail: /opt/local/sbin/sendmail antispam_mailtrain_crm_binary: /bin/false

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[Dovecot] AntiSpam Plugin issue
by Leander S. 25 Jul '10

25 Jul '10

Hi, I'm getting following error when I try to make use of the antispam plugin: /[SERVERBUG] failed to send email / There wasn't that much to configure ?! What am I doing wrong ?! server [~]# dovecot -n # 1.2.12: /usr/local/etc/dovecot.conf # OS: FreeBSD 8.1-RELEASE amd64 ufs protocols: imap imaps pop3 pop3s managesieve listen(default): * listen(imap): * listen(pop3): * listen(managesieve): *:2000 ssl_cert_file: /etc/ssl/mail/mail.cert ssl_key_file: /etc/ssl/mail/mail.key login_dir: /var/run/dovecot/login login_executable(default): /usr/local/libexec/dovecot/imap-login login_executable(imap): /usr/local/libexec/dovecot/imap-login login_executable(pop3): /usr/local/libexec/dovecot/pop3-login login_executable(managesieve): /usr/local/libexec/dovecot/managesieve-login login_greeting: Mail System verbose_proctitle: yes first_valid_uid: 2000 first_valid_gid: 2000 mail_privileged_group: mail mail_location: maildir:/var/mail/%d/%n mail_executable(default): /usr/local/libexec/dovecot/imap mail_executable(imap): /usr/local/libexec/dovecot/imap mail_executable(pop3): /usr/local/libexec/dovecot/pop3 mail_executable(managesieve): /usr/local/libexec/dovecot/managesieve mail_plugins(default): quota imap_quota autocreate antispam mail_plugins(imap): quota imap_quota autocreate antispam mail_plugins(pop3): quota mail_plugins(managesieve): mail_plugin_dir(default): /usr/local/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3 mail_plugin_dir(managesieve): /usr/local/lib/dovecot/managesieve imap_client_workarounds(default): outlook-idle imap_client_workarounds(imap): outlook-idle imap_client_workarounds(pop3): imap_client_workarounds(managesieve): pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh pop3_client_workarounds(managesieve): managesieve_implementation_string(default): dovecot managesieve_implementation_string(imap): dovecot managesieve_implementation_string(pop3): dovecot managesieve_implementation_string(managesieve): NetOcean lda: postmaster_address: admin@server mail_plugins: sieve log_path: /var/log/dovecot-deliver.log info_log_path: /var/log/dovecot-deliver.log auth default: mechanisms: cram-md5 username_format: %Lu passdb: driver: sql args: /usr/local/etc/dovecot-sql.conf userdb: driver: sql args: /usr/local/etc/dovecot-sql.conf socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix master: path: /var/run/dovecot/auth-master mode: 384 user: dovecot group: dovecot plugin: autocreate: Trash autocreate2: Sent autocreate3: Drafts autocreate4: Spam autocreate5: Virus autosubscribe: Trash autosubscribe2: Sent autosubscribe3: Drafts autosubscribe4: Spam autosubscribe5: Virus sieve: ~/.dovecot.sieve sieve_dir: ~/sieve sieve_global_path: /usr/local/etc/dovecot/sieve/default.sieve antispam_mail_sendmail: /usr/local/bin/sa-learn antispam_mail_spam: --spam antispam_mail_notspam: --ham antispam_mail_tmpdir: /tmp antispam_spam_pattern_ignorecase: junk;spam antispam_trash_pattern_ignorecase: trash;Deleted * Thanks

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