February 2015 - dovecot

Re: lazy_expunge + mdbox
by fernando.figaro＠uol.com.br 18 Feb '15

18 Feb '15

It appears to me that this issue is related to how lazy_expunge and last_instance work with mdbox - that is different from maildir. With maildir, the message is moved to the expunged namespace only when the last copy is removed (example: from trash folder). With mdbox, first time when you move message from one folder to another, dovecot creates a copy in the expunge namespace. When you delete messages or expunge them from Trash folder (example, nightly 'doveadm expunge' cronjob) they are simply deleted because they already have copies at expunged namespace. @Timo, is that correct ? This is what I could understand from my tests. Thanks, Fernando De: fernando.figaro(a)uol.com.br Enviada: Quarta-feira, 4 de Fevereiro de 2015 23:15 Para: dovecot(a)dovecot.org Assunto: lazy_expunge + mdbox Hi, I'm studying an issue related to mdbox and lazy_expunge. If it is active in the imap configuration, when you delete a message (copy to new folder + expunge old folder), a copy is also sent to the expunge namespace. I realize that is something related to mdbox and lazy_expunge_only_last_instance and found almost no references except this one (http://hg.dovecot.org/dovecot-2.2/file/24d6708cea76/TODO) lazy_expunge_only_last_instance=yes + mdbox doesn't work, because refcounts don't update immediately One other suggestion I found was to disable 'move' capability. Does anyone has other news regarding this issue ? Thanks, Fernando

1 0

doveadm sync out of memory
by Casey Stone 18 Feb '15

18 Feb '15

Hello: I've been looking forward to getting my mail server up to Dovecot 2.2+ to be able to use the sync mechanism. I run my own mail server just for myself, with a few different accounts, and want to keep a master and backup server in sync. I'm running the Ubuntu server 14.04.1 mail stack which features Dovecot 2.2.9 (and Postfix). My setup is to use system users (userdb passwd / passdb pam) with ~/Maildir. I'll post full sanitized output of dovecot -n if it seems necessary. I have not enabled any plugins (do I need the replicator plugin active?) I have in my conf a doveadm_password defined. Anyway, after setting up an ssl listener on the main machine and after considerable struggles with SSL, I was able to run doveadm sync from the backup server successfully for a small mailbox (around 78 MB) with this command: doveadm sync -R tcps:mainserver.example.com:12345 Since I run this command as the system user on the backup server (same system users as main server) it 'just works' for the correct single user with no further options required. My plan is to run a daily cron job to sync once daily for each user. The problem is when I try to sync a larger mailbox, say 1 GB, dsync-server on the remote (master) machine throws fatal error 83 Out of Memory. I already raised vsz_limit to 512 MB. Problems probably arise with mailboxes around 200 MB though I haven't tested specifically. So my question is, is this expected and I will need to give my VM much more memory to be able to use dovecot sync, or do I have something set wrong, or is it a bug? Thanks for your help.

2 5

how to run dovecot imap on separate server from postfix?
by Robert Fantini 18 Feb '15

18 Feb '15

Hello we are using version 2.2.13 on debian. currently imap runs on the same system as postfix , spamassassin and other mail related software. I'd like to move dovecot imapd and mail storage to its own system. I've search google and wiki and could not see how to do so. could someone please point me in the direction to that done? I like reading documentation.. here is more info on our set up: postfix: # grep dovecot /etc/postfix/* /etc/postfix/main.cf:mailbox_transport = lmtp:unix:private/dovecot-lmtp /etc/postfix/main.cf:smtpd_sasl_type = dovecot kind regards Rob Fantini

2 9

Permissions for shared mail don't work
by Damien Desfontaines 17 Feb '15

17 Feb '15

Hello, (Sorry if you already received this mail. I sent it without having subscribed to the list, but I never got any confirmation; so I assumed it has been filtered by the anti-spam or something.) I'm using dovecot v.2.1.7 on Debian Sid, and the output of dovecot -n is available here: http://paste.fulltxt.net/C-O I'm trying to make the mailbox of (system) user "spam" available to user "ted". I followed these instructions: http://wiki2.dovecot.org/SharedMailboxes/Permissions and it doesn't seem to work. To be more precise: - I manually (and recursively) changed the permissions of all files in ~spam/Mail to 660 (and 770 for the directories); - I manually (and recursively) changed the group owner of everything in ~spam/Mail to "mailperso", where "mailperso" is a group whose users are spam and ted; - I added « mail_access_groups=mailperso » into my dovecot config; - and I restarted dovecot. But still, when I send a new email to spam, it appears as being owned by group "spam" and having permissions set to 600, so I can't access it with user "ted". I also tried to set the setgid bit for ~spam/Mail, it didn't change anything, and when I recursively set the setgid for all subdirectories of ~spam/Mail, it gives new mails the correct group (mailperso) but not the correct permissions. Have I missed something, or is this a bug? Thanks in advance and best regards, Damien

3 8

Help with archive server
by Joy 17 Feb '15

17 Feb '15

Hi, I want to build a system where 6 months old mail to be moved to archive server to keep my mailbox clean and fast. Is there any way to achieve the same using any pre-built binary shipped with dovecot ? Thanks and Regards Joy

2 2

Re: Re: Cannot delete folders from Maildir in only one account
by Christian Vielhauer 17 Feb '15

17 Feb '15

Hi Steffen thanks for your reply. I found that permissions of some folders are different than others… After chmod all permissions to the same go= permissions, it works. No matter what happens to generate different permissions for only this one account. Because all other accounts are correct. I will have a look at this from time to time. As soon it not happens agains this thread is solved. On Mon, 16 Feb 2015, Christian Vielhauer wrote: > I try to delete the folder „test" from Thunderbird 31.4.0 (Win), Webmail (Sogo 2.2.16), or Mail 8.2 (Mac Yosemite), but I am not able to delete in this account. > Nevertheless I am able to create new folders. These new folders are not deleteable, too. What's the returned description sctring, if you try to delete the folder manually via telnet? > dovecot 2.2.9 on Ubuntu 14.04 LTS 64-bit > > In /var/log/mail.{err,log} I cannot see any errors. What does Dovecot log? It usually logs to somewhere else. > In another account it works without any problems. (create and delete folders) - -- Steffen Kaiser

1 0

auth: Fatal: No passdbs specified in configuration file
by rub zorghy 17 Feb '15

17 Feb '15

Hi, I upgraded to 20150213 (f10725a5eed8+). I chose LDAP as the authentication source for Dovecot. Compilation succeeds. Starting dovecot from command line : /usr/local/sbin/dovecot -c /usr/local/etc/dovecot/ The error log contains : "dovecot: auth: Fatal: No passdbs specified in configuration file. PLAIN mechanism needs one" It works properly with Dovecot 2.0.9. Any clues or suggestions, anything I could try...? Thanks, This is the output of dovecot -n: # 20150213 (f10725a5eed8+): /usr/local/etc/dovecot/dovecot.conf # OS: Linux 2.6.32-504.el6.x86_64 x86_64 Red Hat Enterprise Linux Server release 6.6 (Santiago) doveconf: Warning: Dovecot was last started using /usr/local/etc/dovecot/, but this config is /usr/local/etc/dovecot/dovecot.conf auth_debug = yes auth_debug_passwords = yes auth_master_user_separator = * auth_mechanisms = plain login auth_verbose = yes disable_plaintext_auth = no mail_debug = yes mail_gid = 5000 mail_location = maildir:~/Maildir:LAYOUT=fs mail_plugins = " quota acl" mail_uid = 5000 mbox_write_locks = fcntl namespace { list = children location = maildir:/store/vmail/public:LAYOUT=fs prefix = public/ separator = / subscriptions = no type = public } namespace inbox { inbox = yes location = prefix = } passdb { args = /usr/local/etc/dovecot/master-users driver = passwd-file master = yes pass = yes } passdb { args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { quota = maildir quota_rule = *:storage=50M quota_rule2 = Trash:storage=+5M quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u } service auth { client_limit = 9516 unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service imap-login { process_min_avail = 2 service_count = 0 } service imap { process_limit = 8192 } service quota-warning { executable = script /usr/local/bin/quota-warning.sh unix_listener quota-warning { user = vmail } user = vmail } ssl_cert = </etc/pki/dovecot/certs/dovecot.pem ssl_key = </etc/pki/dovecot/private/dovecot.pem syslog_facility = local5 userdb { args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext driver = ldap } verbose_ssl = yes

2 1

Cannot delete folders from Maildir in only one account
by Christian Vielhauer 17 Feb '15

17 Feb '15

Hi I try to delete the folder „test" from Thunderbird 31.4.0 (Win), Webmail (Sogo 2.2.16), or Mail 8.2 (Mac Yosemite), but I am not able to delete in this account. Nevertheless I am able to create new folders. These new folders are not deleteable, too. dovecot 2.2.9 on Ubuntu 14.04 LTS 64-bit In /var/log/mail.{err,log} I cannot see any errors. In another account it works without any problems. (create and delete folders) Have you any hint, I can try? Chris

2 1

Dovecot fsync question
by Christian Binder Stadt Freilassing 17 Feb '15

17 Feb '15

Hello, I followed these steps in http://wiki2.dovecot.org/MailLocation/LocalDisk # Default to no fsyncing mail_fsync = never protocol lda { # Enable fsyncing for LDA mail_fsync = optimized } protocol lmtp { # Enable fsyncing for LMTP mail_fsync = optimized } This gives quite a good performance, but I'm not sure about the risks. Does it mean that things like *put a Sent Mail to Sent folder *change status of mails really don't get synced to disk for a long time (hours??). Or do we talk about seconds and everything is fine when dirty pages get synced by the system. cat /proc/meminfo | grep 'Dirty' lets me assume that there are always just a few KB in the dirty pages and these are written to disk every few seconds. Are the dovecot "mail_fsync = never" transactions inclduded there? Thanks a lot! Christian

1 0

Re: /etc/ssl/certs/dovecot.pem erased by OpenSuse's update mechanism
by dovecot＠lists.killian.com 17 Feb '15

17 Feb '15

On 2015/2/16 16:28, Jochen Bern wrote: > On 02/16/2015 04:23 PM, Reindl Harald wrote: >>> "The CA file should contain the certificate(s) followed by the >>> matching CRL(s). Note that the CRLs are required to exist. For a >>> multi-level CA place the certificates in this order: >>> >>> Issuing CA cert >>> Issuing CA CRL >>> Intermediate CA cert >>> Intermediate CA CRL >>> Root CA cert >>> Root CA CRL" >> >> that is how you can and should build your PEM files for *every* SSL > ^^^^^^^ >> aware software > > NACK. I have set up CentOS 6 servers a little more than two years ago > with that format used for dovecot and OpenVPN, including verification > that the functionality was there. Last month we had a need to revoke a > client's certs and it turned out that OpenVPN had silently stopped > honoring the CRLs somewhere along the update path (dovecot still > enforces them). I had to QuickFix the OpenVPN config from the above > monolithic file over to a CApath > > https://www.openssl.org/docs/ssl/SSL_CTX_load_verify_locations.html#notes > > to successfully lock the disgraced client out. > > Regards, > J. Bern OpenVPN has --crl-verify that takes a file as well as a directory. I guess what you're saying is that accepts, but silently ignores the CRLs if put in the cert file. It would be nicest if all the software wanted things configured things the same way. Personally I like the way Dovecot does it, but having things be uniform would be even better. From my quick survey, a lot of the programs (or at least their documentation) doesn't support CRLs at all. Postfix wants multiple certificates specified by different .cf entries (it appears to not support CRLs--at least they aren't mentioned in documentation): smtpd_tls_cert_file smtpd_tls_key_file smtpd_tls_dcert_file smtpd_tls_dkey_file smtpd_tls_eccert_file smptd_tls_eckey_file smtpd_tls_CAfile Apache2.4 wants SSLCertificateFile SSLCertificateKeyFile repeated multiple times for different cert types. Making it worse, Apache2.4.8 wants the whole cert chain in the above, but earlier versions wanted SSLCertificateChainFile to have the non-leaf chain. Courier IMAP SSL wants TLS_CERTFILE specifying a file containing both the certificate and private key catenated. OpenVPN wants ca certificate chain used for signing.pem cert certificate.pem key privatekey.pem crl-verify crl.pem OpenLDAP appears similar to OpenVPN with (appears not to support CRLs): TLSCACertificatePath TLSCertificateFile TLSCertificateKeyFile Racoon wants (appears not to support CRLs): certificate_type x509 certfile keyfile ca_type x509 ca.pem But the man page doesn't talk about where the chain goes. So it appears one should generate the following file formats to satisfy all the software out there: 1. cert standalone (OpenVPN, Racoon, OpenLDAP, Postfix, Apache 2.4.7 and earlier) 2. cert chain (Apache 2.4.8 and later) 3. cert ca crl chain (Dovecot) 4. ca chain (OpenVPN, Racoon?, OpenLDAP, Postfix, Apache 2.4.7 and earlier) 5. crl chain (OpenVPN) 6. cert, key catenation (Courier IMAP) Getting all these configured the same way isn't going to happen, so I guess the next best thing would be a cookbook. Anyone know of one? -Earl

1 0