- dovecot - dovecot.org

dsync mail from a remote server
by Kai Schaetzl 10 Sep '18

10 Sep '18

I would like to transfer mail for some users from an old dovecot (with no doveadm) to a modern dovecot (2.3.2). I've read up on https://wiki2.dovecot.org/Tools/Doveadm/Sync https://wiki2.dovecot.org/Migration/Dsync and I'm not sure if I can use doveadm for this purpose. I need doveadm to login to the remote server (source) with a username/password via IMAP, fetch all mail and deliver it to a local user (target), preferrably with the same folder structure that exists on the source account. Is this possible? I don't understand this page completely: https://wiki2.dovecot.org/Migration/Dsync For some testing (that's why I used pop3, to keep it simple) I put a file for pop3c in conf.d (mostly identical with the file shown on that page) and restarted dovecot. Then I tried a command line like this: doveadm -o pop3c_user=user -o pop3c_password=password backup -R -u user@domain pop3c: This creates an error: dsync(user@domain): Error: Mail locations must use the same virtual mailbox hierarchy separator (specify separator for the default namespace) I'm not sure what this exactly means. Does it refer to the account naming structure of user@domain? The source server does not have such usernames, only the target server I run the command on. Or does it refer to structure within the mailbox? (which can't really be the case as it doesn't login to the source and can't know the structure yet). So, if it indeed refers to the user naming structure, can I tell it to use the "simple" account names on the source machine? Am I correct in assuming that I can override any pop3c_ setting in the conf file with -o? For instance also using -o pop3c_host= and that if there is -o pop3c_user=user on the command line I don't need a pop3c_user in the conf file? (no master-user). Thanks for any help on this. (If it doesn't work I can use fetchmail, but that is much less preferrable as it "delivers" all mail, so it's all "new" and in the INBOX. Kai

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Disconnects on Director
by Tom Sommer 10 Sep '18

10 Sep '18

Hi I am seeing a lot of clients time out on my Director. I'm wondering if this is "normal" or there is some opportunity to tweak something? Log line: imap-login: Info: proxy(user(a)example.com): disconnecting 1.2.3.4 (Disconnected by client: read(size=433) failed: Connection timed out(37s idle, in=939, out=3083)): user=<user(a)example.com>, method=CRAM-MD5, rip=1.2.3.4, lip=172.0.0.0, TLS: read(size=433) failed: Connection timed out, session=<P2kq7H91H4dZF/2O> Any hints? Nothing is logged by the kernel. 2.3.2.1 -- Tom

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Dovecot - being dropped
by Maurizio Caloro 10 Sep '18

10 Sep '18

Hello Yesterday, I could not receive an email anymore when I looked in the logs found the following errors: * Sep 7 06:04:44 mail dovecot: master: Warning: service(imap-login): process_limit (100) reached, client connections are being dropped * Sep 7 06:06:41 mail dovecot: master: Warning: service(imap-login): process_limit (100) reached, client connections are being dropped If show the config i dont see any process_limits Dovecot 2.2.13 root@mail:/var/log# dovecot -n # 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 3.16.0-6-amd64 x86_64 Debian 8.11 auth_mechanisms = plain login auth_verbose = yes disable_plaintext_auth = no info_log_path = /var/log/mail.log log_timestamp = %b %d %H:%M:%S Dovecot/ mail_access_groups = vmail mail_location = maildir:~/Maildir 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 vironment mailbox date ihave namespace inbox { inbox = 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 = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { sieve = ~/sieve/.dovecot.sieve sieve_dir = ~/sieve } postmaster_address = admin@ protocols = imap pop3 lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-client { mode = 0660 user = mail } } service lmtp { inet_listener lmtp { address = 127.0.0.1 port = 24 } } ssl_cert = </etc/dovecot/dovecot.pem ssl_key = </etc/dovecot/private/dovecot.pem userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lda { mail_plugins = " quota sieve" } protocol imap { mail_plugins = " quota imap_quota" } root@mail:/var/log#

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Re: Dsync deleting mailboxes due to duplicate UIDs
by Andreas Thienemann 10 Sep '18

10 Sep '18

Hi Sami, On Sun, 9 Sep 2018, Sami Ketola wrote: > Is it possible to get imapc rawlogs to analyze? create a directory that is > writeable and add -o imapc_rawlog_dir=/path/to/directory to command line. Tried that. Thanks for the suggestion, that is actually really helpful. If anyone wants to play along at home, the files in that directory are created with the permissions of mail_uid/mail_gid. The dir should be world-writable to make it easy. > Also with recent dovecot release you can tell dsync which header fields to > hash when matching mails. Add dsync_hashed_headers=Message-ID to config and > dovecot will only mach mails using Message-ID header fileld. I had seen that parameter but thought it would be prudent to not _just_ rely on the Message-ID but instead keep the default "Date Message-ID". I _think_ I might have found an issue when looking at the log: 1536525811.026071 * 39 FETCH (UID 39 BODY[HEADER.FIELDS (Date Message-ID)] {159} 1536525811.026071 Message-ID: <Pine.LNX.4.30.0207091925420.433-100000(a)trinity.knopfdruck.org> 1536525811.026071 Date: Tue, 9 Jul 2002 19:26:04 +0200 (MEST) 1536525811.026071 Date: Tue, 9 Jul 2002 12:36:13 +0200 1536525811.026071 1536525811.026071 ) A duplicate Date header is certainly unexpected. Having a look at the original mail on disk on the Cyrus server shows the following Mail: >From [redacted] Tue Jul 9 19:26:04 2002 X-Sieve: cmu-sieve 1.3 Return-Path: [redacted] Received: from bender.bawue.de (localhost [127.0.0.1]) by bender.bawue.de (Postfix) with ESMTP id C79CE48CBC; Tue, 9 Jul 2002 19:29:08 +0200 (CEST) Delivered-To: [redacted] Received: from [redacted] by bender.bawue.de (Postfix) with ESMTP id CFA4848CAA for [redacted]; Tue, 9 Jul 2002 19:28:43 +0200 (CEST) From: [redacted] X-Sender: [redacted] To: [redacted] Message-ID: <Pine.LNX.4.30.0207091925420.433-100000(a)trinity.knopfdruck.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Subject: [redacted] Date: Tue, 9 Jul 2002 19:26:04 +0200 (MEST) Status: RO X-Status: X-Keywords: X-UID: 38 ---------- Forwarded message ---------- Date: Tue, 9 Jul 2002 12:36:13 +0200 Subject: Gewinn [redacted] So it looks like the Cyrus imapd is incorrectly parsing the mail and returning the body content as a header. Comparing the content of UID 39 on the remote server will then hash differently than the UID 39 on the local dovecot server, which behaves better and only returns a single date header. Following the robustness principle it feels to me that it would make sense for dsync to disregard a duplicate header from a remote server and only use the first occurence. Would that be a good approach to the problem? Now that I understand the problem I am having, I can just workaround it but it seems to me that dsync should handle this case better. Anyway, thanks a lot for the imapc_rawlog_dir hint, that helped a lot. cheers, Andreas

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Re: Auth process sometimes stop responding after upgrade
by Simone Lazzaris 08 Sep '18

08 Sep '18

In data venerdì 7 settembre 2018 09:39:23 CEST, Aki Tuomi ha scritto: > Do you see anything else in logs? > Just the usual proxy messages, like these: Sep 6 14:45:41 imap-front13 dovecot: imap-login: proxy(alessandro(a)soldinicarrelli.it): disconnecting 5.169.233.224 (Disconnected by server(0s idle, in=451, out=3556)): user=<alessandro(a)soldinicarrelli.it>, method=PLAIN, rip=5.169.233.224, lip=80.76.81.92, TLS, session=<uqVq2TJ1VbkFqeng> Sep 6 14:45:51 imap-front13 dovecot: pop3-login: proxy(prg(a)pedrini.it): started proxying to 192.168.1.144:110: user=<prg(a)pedrini.it>, method=DIGEST- MD5, rip=5.34.191.10, lip=80.76.81.92, TLS, session=<WqhRRDN1qw0FIr8K> The only suspect thing is this: Sep 6 14:45:41 imap-front13 dovecot: director: doveadm: Host 192.168.1.142 vhost count changed from 100 to 0 Sep 6 14:45:41 imap-front13 dovecot: director: doveadm: Host 192.168.1.143 vhost count changed from 100 to 0 Sep 6 14:45:41 imap-front13 dovecot: director: doveadm: Host 192.168.1.219 vhost count changed from 100 to 0 Nothing on the other system logs (e.g. kernel, daemon, syslog, messages ....). -- *Simone Lazzaris* *Qcom S.p.A.*

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Sievescript in database
by Harald Leithner 07 Sep '18

07 Sep '18

Hi, is it possible to save sieve scripts to a mysql database? I know its possible to read them with the dict sql plugin but iirc it wasn't possible to save it with sievemanaged. thx Harald -- Harald Leithner ITronic Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria Tel: +43-1-545 0 604 Mobil: +43-699-123 78 4 78 Mail: leithner(a)itronic.at | itronic.at

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Auth process sometimes stop responding after upgrade
by Simone Lazzaris 07 Sep '18

07 Sep '18

Hi all; I've upgraded a ring of dovecot directors from 2.2.15 to 2.2.36. After the upgrade I've got some instability: a few time per day per server, seemly at random, the auth process stop responding and the clients cannot authenticate any more: Sep 6 14:45:51 imap-front13 dovecot: pop3-login: Warning: Auth process not responding, delayed sending initial response (greeting): user=<>, rip=xx.xx.xx.xx, lip=xx.xx.xx.xx, TLS, session=<1HVqRTN10MNTie+S> I can't figure it out.... Any hints? This is my configuration: # 2.2.36 (1f10bfa63): /usr/local/etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-686-pae i686 Debian 7.11 # Hostname: imap-front13.mailfarm.interac.it auth_mechanisms = plain login digest-md5 cram-md5 apop scram-sha-1 auth_verbose = yes auth_verbose_passwords = plain auth_worker_max_count = 50 base_dir = /var/run/dovecot/ default_login_user = nobody director_doveadm_port = 9091 director_mail_servers = 192.168.1.142 192.168.1.143 192.168.1.144 192.168.1.145 192.168.1.216 192.168.1.217 192.168.1.218 192.168.1.219 director_servers = 212.183.164.157 212.183.164.158 212.183.164.159 212.183.164.160 listen = * passdb { args = /usr/local/etc/dovecot/sql.conf driver = sql } protocols = imap pop3 service director { fifo_listener login/proxy-notify { mode = 0666 } inet_listener { port = 9090 } unix_listener director-userdb { mode = 0600 } unix_listener login/director { mode = 0666 } } service imap-login { executable = imap-login director service_count = 0 vsz_limit = 128 M } service pop3-login { executable = pop3-login director service_count = 0 vsz_limit = 128 M } ssl_cert = </usr/local/etc/dovecot/qcom.wildcard.pem ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM- SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA- AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128- SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128- SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256- SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS- AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256- SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128- SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:! MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA ssl_dh_parameters_length = 2048 ssl_key = # hidden, use -P to show it ssl_parameters_regenerate = 1 weeks ssl_prefer_server_ciphers = yes ssl_protocols = !SSlv2 !SSLv3 syslog_facility = local5 userdb { driver = prefetch } -- *Simone Lazzaris* *Qcom S.p.A.*

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Virtual Maildir as subfolder
by Duncan Bellamy 07 Sep '18

07 Sep '18

I have a setup where google fetches mail from dovecot with pop3s and deletes mail downloaded, so to do this I currently forward a copy of the email to user-fetch@localhost which is the google login and it downloads from that maildir. But it means creating extra folders and I was looking at better ways of doing it. So I have an entry in my user DB file which ends with userdb_mail=maildir:/var/mail/virtual/adomain.com/user/Maildir/.Gfetch, and if I do a "doveadm auth test user(a)adomain.xn--com-9o0a it shows the correct mail location of the .Gfetch folder. But even though it has 6 messages in the folder a doveadm search and google both see zero messages. I think this is because the index file is only in the root of the maildir, is there a way to have a ‘virtual root’ inside a maildir like this? Thanks, Duncan

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Auth process sometimes stop responding after upgrade
by Simone Lazzaris 06 Sep '18

06 Sep '18

Hi all; I've upgraded a ring of dovecot directors from 2.2.15 to 2.2.36. After the upgrade I've got some instability: a few time per day per server, seemly at random, the auth process stop responding and the clients cannot authenticate any more: Sep 6 14:45:51 imap-front13 dovecot: pop3-login: Warning: Auth process not responding, delayed sending initial response (greeting): user=<>, rip=xx.xx.xx.xx, lip=xx.xx.xx.xx, TLS, session=<1HVqRTN10MNTie+S> I can't figure it out.... Any hints? This is my configuration: # 2.2.36 (1f10bfa63): /usr/local/etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-686-pae i686 Debian 7.11 # Hostname: imap-front13.mailfarm.interac.it auth_mechanisms = plain login digest-md5 cram-md5 apop scram-sha-1 auth_verbose = yes auth_verbose_passwords = plain auth_worker_max_count = 50 base_dir = /var/run/dovecot/ default_login_user = nobody director_doveadm_port = 9091 director_mail_servers = 192.168.1.142 192.168.1.143 192.168.1.144 192.168.1.145 192.168.1.216 192.168.1.217 192.168.1.218 192.168.1.219 director_servers = 212.183.164.157 212.183.164.158 212.183.164.159 212.183.164.160 listen = * passdb { args = /usr/local/etc/dovecot/sql.conf driver = sql } protocols = imap pop3 service director { fifo_listener login/proxy-notify { mode = 0666 } inet_listener { port = 9090 } unix_listener director-userdb { mode = 0600 } unix_listener login/director { mode = 0666 } } service imap-login { executable = imap-login director service_count = 0 vsz_limit = 128 M } service pop3-login { executable = pop3-login director service_count = 0 vsz_limit = 128 M } ssl_cert = </usr/local/etc/dovecot/qcom.wildcard.pem ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM- SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA- AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128- SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128- SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256- SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS- AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256- SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128- SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:! PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA ssl_dh_parameters_length = 2048 ssl_key = # hidden, use -P to show it ssl_parameters_regenerate = 1 weeks ssl_prefer_server_ciphers = yes ssl_protocols = !SSlv2 !SSLv3 syslog_facility = local5 userdb { driver = prefetch } *Simone Lazzaris* *Qcom S.p.A.* simone.lazzaris(a)qcom.it[1] | www.qcom.it[2] * LinkedIn[3]* | *Facebook[4]* [5] -------- [1] mailto:simone.lazzaris@qcom.it [2] https://www.qcom.it [3] https://www.linkedin.com/company/qcom-spa [4] http://www.facebook.com/qcomspa [5] https://www.qcom.it/includes/email-banner.gif

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Global duplicate filtering via Sieve
by Hanno Stock 06 Sep '18

06 Sep '18

Hi everybody, I have the following problem: Our mail users are receiving mails from externally defined mail forwardings and lists which sometimes leads to duplicate messages. As far as I understand, a single user can use the Sieve duplicate extension for filtering out such duplicate messages. Would it be feasible to add a script with sieve_before that does this for all users? Do scripts that run from sieve_before store persistent data also on a per-user basis, i.e. in the user's home dir? Thanks for your help! Best regards Hanno

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