October 2017 - dovecot

How to require client SSL certificate, except for local connections
by Evan Martin 06 Oct '17

06 Oct '17

Is there any way to make Dovecot 2.2.22 not require a client SSL certificate for a local IMAP connection, but require it for any remote IMAP connection? My server is configured to require client certificates: ssl = required ... auth_ssl_require_client_cert = yes I tried adding the following to create an exception for localhost: remote 127.0.0.1 { ssl = no auth_ssl_require_client_cert = no disable_plaintext_auth = no } But Dovecot fails to start with: doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf line 81: Auth settings not supported inside local/remote blocks: Is there any other way to do this? I don't need to override any other auth settings, just that one. I could probably use a Unix socket, if that would help. Thanks, Evan

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Director DNS
by Travis Dolan 06 Oct '17

06 Oct '17

Hello, I am currently running 2.2.31. I have a cluster of dovecot instances running in AWS. - Two instances running Director/Proxy - Two instances running Dovecot. -- Storage for the Dovecot instances is EFS. My setup works, requests for 143 hit my Director cluster and are proxied to an appropriate dovecot backend. My question is how often if at all the Director service looks up the addresses for the following setting... *director_servers = mailproxy.internal* I have created a Lambda to continually update the values for the A records found in the *.internal* zone since EC2 instances can come and go for a variety of reasons. If those values changes will the Director service "notice" or will a "service dovecot restart" be needed? Thank in advance.

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Re: ACL permission: give permission to move email into different folder
by Davide Marchi 06 Oct '17

06 Oct '17

> I've set ACL for two user (two primary email address, no alias), where > these users must not be able to delete email from imap server. > Now I would like to add (from the client) the ability to move any > incoming mail into different directory, if possible into an existing > directory chosen by me. Maybe it is not possible with Dovecot? Many Thanks Davide

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seccomp filter for dovecot
by Phoenix Krypt 06 Oct '17

06 Oct '17

Hi, I would like to contribute to dovecot by adding seccomp system call filtering. Is this something you would like to merge into the dovecot codebase? If so, I can put up a PR on github once I complete it. Thanks, Archana

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Dovecot Performance Issues on VMWARE Esxi
by Holger 06 Oct '17

06 Oct '17

Hello, I'm new to dovcot, but have serious issues with dovecot and IMAP. I'm struggling with low IMAP performance but have no glue, where to start my search. It is a small office setup. 10 Mailaccounts. Mine is the biggest with 4GB in size. But searching for mail takes several seconds... Zu switch to specific folder also takes some seconds. To long in my opinion. I use esxi 6.0 with local datastorage lenovo megaraid raid5 3x2TB SAS 7.2K. On the dovecot appliance i see high iowait. Some issues dovecot or the VM config? Any help i would appreciate... -- Sent from: http://dovecot.2317879.n4.nabble.com/

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moving from mysql to pgsql
by Magnus 06 Oct '17

06 Oct '17

Hello, I hope that this mailing list is "alive", since I am looking for a solution for my problem for a long time. I would like to migrate my existing dovecot installation from mysql to pgsql. But I have problems with the passwords when using pgsql. The existing and working mysql-based installation looks like this: dovecot-sql.conf.ext: driver = mysql default_pass_scheme = SHA512-CRYPT Users are created like this: INSERT INTO mls_user (idx,domain,password,email) VALUES (1,99,ENCRYPT('Test'),'mws(a)alpenjodel.de'); This setup is working, which I can verify like this: $ telnet localhost 143 * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN AUTH=DIGEST-MD5 AUTH=CRAM-MD5] Dovecot ready. a login mws(a)alpenjodel.de Test OK Now let's take a look at the pgsql version of the setup: dovecot-sql.conf.ext: driver = pgsql default_pass_scheme = SHA512-CRYPT Users are created like this: INSERT INTO mls_user (idx,domain,password,email) VALUES (1,99,crypt('Test',gen_salt('des')),'mws(a)alpenjodel.de'); This setup is not working: $ telnet localhost 143 * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN AUTH=DIGEST-MD5 AUTH=CRAM-MD5] Dovecot ready. a login mws(a)alpenjodel.de Test a NO [AUTHENTICATIONFAILED] Authentication failed. Assumptions: - I believe that the mysql encrypt function uses the crypt system call, which in turn uses the DES algorithm with a random salt. - I believe that the same is done with the pgsql function call crypt('Test',gen_salt('des')). But obviously some of these assumptions must be wrong. Besides that, the variable "default_pass_scheme" is set to "SHA512-CRYPT" in both cases. But obviously, not SHA but DES is used by the working mysql-based setup. I don't understand that. Could someone please explain the relationship between the default_pass_scheme variable and the encryption/hashing algorithm used to store the user passwords? And finally: What can I do to migrate to pgsql? Thank you Magnus

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v2.2.33 release candidate released
by Timo Sirainen 05 Oct '17

05 Oct '17

https://dovecot.org/releases/2.2/rc/dovecot-2.2.33.rc1.tar.gz https://dovecot.org/releases/2.2/rc/dovecot-2.2.33.rc1.tar.gz.sig There are a couple more small changes still coming, but this should be very close to the final release. I'm especially interested in hearing if there are any problems with doveadm log proxying or with director. We've improved our automated director tests quite a lot now, and fixed some rarely occurring bugs. * doveadm director commands wait for the changes to be visible in the whole ring before they return. This is especially useful in testing. * Environments listed in import_environment setting are now set or preserved when executing standalone commands (e.g. doveadm) + doveadm proxy: Support proxying logs. Previously the logs were visible only in the backend's logs. + Added %{if}, see https://wiki2.dovecot.org/Variables#Conditionals + Added a new notify_status plugin, which can be used to update dict with current status of a mailbox when it changes. See https://wiki2.dovecot.org/Plugins/NotifyStatus + Mailbox list index can be disabled for a namespace by appending ":LISTINDEX=" to location setting. + dsync/imapc: Added dsync_hashed_headers setting to specify which headers are used to match emails. + pop3-migration: Add pop3_migration_ignore_extra_uidls=yes to ignore mails that are visible in POP3 but not IMAP. This could happen if new mails were delivered during the migration run. + pop3-migration: Further improvements to help with Zimbra + pop3-migration: Cache POP3 UIDLs in imapc's dovecot.index.cache if indexes are enabled. These are used to optimize incremental syncs. + cassandra, dict-sql: Use prepared statements if protocol version>3. - sdbox: Mails were always opened when expunging, unless mail_attachment_fs was explicitly set to empty. - lmtp/doveadm proxy: hostip passdb field was ignored, which caused unnecessary DNS lookups if host field wasn't an IP - lmtp proxy: Fix crash when receiving unexpected reply in RCPT TO - quota_clone: Update also when quota is unlimited (broken in v2.2.31) - mbox, zlib: Fix assert-crash when accessing compressed mbox - doveadm director kick -f parameter didn't work - doveadm director flush <host> resulted flushing all hosts, if <host> wasn't an IP address. - director: Various fixes to handling backend/director changes at abnormal times, especially while ring was unsynced. These could have resulted in crashes, non-optimal behavior or ignoring some of the changes. - director: Use less CPU in imap-login processes when moving/kicking many users. - lmtp: Session IDs were duplicated/confusing with multiple RCPT TOs when lmtp_rcpt_check_quota=yes - doveadm sync -1 fails when local mailboxes exist that do not exist remotely. This commonly happened when lazy_expunge mailbox was autocreated when incremental sync expunged mails.

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Issue with imap folder structure
by absolutely_free＠libero.it 05 Oct '17

05 Oct '17

Hi, I use Dovecot 2.2.32 I just migrated spool from another server (by copying filesystem, I use maildir), this is an example of mailbox's content: drwx------ 20 postfix postfix 30 Oct 4 18:38 . drwx------ 3 postfix postfix 3 Nov 16 2012 .. drwx------ 5 postfix postfix 11 Jun 19 18:22 .Deleted Items drwx------ 5 postfix postfix 11 Sep 29 09:27 .Drafts drwx------ 5 postfix postfix 9 Oct 4 10:18 .INBOX.Drafts drwx------ 5 postfix postfix 9 Oct 4 10:18 .INBOX.Sent drwx------ 5 postfix postfix 9 Oct 3 18:01 .INBOX.Trash drwx------ 5 postfix postfix 12 Sep 29 09:27 .Junk drwx------ 5 postfix postfix 8 Dec 9 2014 .Junk E-mail drwx------ 5 postfix postfix 8 Nov 11 2015 .Archive drwx------ 5 postfix postfix 9 Oct 2 14:18 .Posta indesiderata drwx------ 5 postfix postfix 9 Jun 19 18:22 .Posta inviata drwx------ 5 postfix postfix 10 Oct 4 12:27 .Sent drwx------ 5 postfix postfix 10 Oct 4 18:01 .Trash drwx------ 2 postfix postfix 215 Oct 4 18:00 cur -rw------- 1 postfix postfix 53 Feb 16 2017 dovecot-keywords -rw------- 1 postfix postfix 13963 Oct 4 16:45 dovecot-uidlist -rw------- 1 postfix postfix 8 Oct 3 18:01 dovecot-uidvalidity -r--r--r-- 1 postfix postfix 0 Nov 27 2015 dovecot-uidvalidity.5658162a -r--r--r-- 1 postfix postfix 0 Sep 27 18:18 dovecot-uidvalidity.59cbcf5c -rw------- 1 postfix postfix 7200 Sep 29 01:19 dovecot.index -rw------- 1 postfix postfix 63336 Oct 4 18:00 dovecot.index.cache -rw------- 1 postfix postfix 6436 Oct 4 18:38 dovecot.index.log -rw------- 1 postfix postfix 216 Oct 3 18:01 dovecot.mailbox.log drwx------ 2 postfix postfix 2 Oct 4 16:45 new -rw------- 1 postfix postfix 96 Oct 3 18:01 subscriptions drwx------ 2 postfix postfix 2 Oct 4 16:12 tmp and this is my Dovecot's conf: auth_mechanisms = plain login digest-md5 cram-md5 disable_plaintext_auth = no first_valid_gid = 125 first_valid_uid = 125 mail_gid = 1003 mail_location = maildir:/var/spool/virtual/domains mail_privileged_group = postfix mail_uid = 1003 namespace { inbox = yes location = prefix = INBOX. separator = . type = private } namespace inbox { 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 = } passdb { args = /usr/local/etc/dovecot/dovecot-sql.conf.ext driver = sql } passdb { args = /etc/dovecot/dovecot-sql-crypt.conf.ext driver = sql } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { group = postfix mode = 0600 user = postfix } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl_cert = </etc/ssl/wildcard.domain.net_bundle.crt ssl_key = # hidden, use -P to show it userdb { args = /usr/local/etc/dovecot/dovecot-sql.conf.ext driver = sql It seems I have duplicate folder (for example during webmail access, I use Roundcube). What is wrong with my setup? Thank you

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STAT command error
by Andrew Charnley 04 Oct '17

04 Oct '17

Hi, Unsure if my previous message made it through as didn't see it on a digest. I'm using Claws Email and 3 of 4 email accounts keep giving; [10:50:45] POP< +OK Dovecot ready. [10:50:45] POP> USER sales [10:50:45] POP< +OK [10:50:45] POP> PASS ******** [10:50:45] POP< +OK Logged in. [10:50:45] POP> STAT [10:50:45] POP< -ERR Unknown command: *** error occurred on POP session *** Error occurred while processing mail. I've turned on as much logging as I can find in Dovecot but nothing useful is coming out, it honestly does believe STAT is invalid - I can see the connection close rather than disconnect. It's strange how it works for one account but not others, the settings are identical - I went through them with a fine tooth comb. Any suggestions appreciated. Regards, Andrew

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ACL permission: give permission to move email into different folder
by Davide Marchi 03 Oct '17

03 Oct '17

Hi friends, I've set ACL for two user (two primary email address, no alias), where these users must not be able to delete email from imap server. Now I would like to add (from the client) the ability to move any incoming mail into different directory, if possible into an existing directory chosen by me. These are the settings on /etc/dovecot/dovecot.acl: * user=foo(a)mydomain.com lrwsip * user=info(a)mydomain.com lrwsip is it possible? I've read https://wiki2.dovecot.org/ACL but I've not found a solution. many many thanks! Davide

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