March 2012 - dovecot - dovecot.org

[Dovecot] 2.0.X -> 2.1 pitfalls?
by Frank Elsner 09 Jun '12

09 Jun '12

Hi all, are there any pitfalls known for the migration from 2.0.18 to 2.1? Can I simply stop dovecot, make install and start again? --Frank Elsner

10 22

[Dovecot] dovecot and systemd
by Michal Hlavinka 09 May '12

09 May '12

Hi all, dovecot supports systemd socket activation. Together with standard unit activation (like old sysv init script), there are two ways how to configure dovecot(only interface:port, not whole configuration). This can result in situation where those configurations does not say the same. Question is what should happen then? For example, lets have dovecot configured to listen for imap(s) and lets have systemd dovecot socket configured to listen for all protocols - pop3(s) and imap(s). When dovecot is configured to start on boot, systemd will start it and dovecot will listen on imap(s) ports. But when dovecot.socket is enabled, it'll listen on pop3(s) too and when new pop3 connection comes, it'll pass it to dovecot and dovecot will serve it. The question is: Should this happen? What exactly should happen when dovecot.conf does not match dovecot.socket configuration? Michal

2 6

[Dovecot] Refiltering mails without loosing flags
by Dieter Knopf 30 Apr '12

30 Apr '12

Hello, is there a way to refilter all mails in a folder without loosing all flags and moving all messages in a different folder? I have >10k mails in my Inbox and need to create new filterrules from time to time. But there is no way to refilter my inbox without moving. Atm i need to move all mails in a folder like "refilter" and then run getmail/... to refilter the mails. It would be really nice to refilter a existing folder and just move mails with hits in the filter list. Thanks Dieter

2 3

[Dovecot] setacl fails - does not find dovecot-acl file
by Michael Stilkerich 29 Apr '12

29 Apr '12

Hi, I'm using dovecot 2.0.13 that ships with Ubuntu 11.10. I tried setting up a shared namespace as documented in the wiki to enable the sharing of a mailbox between two users. I have a Maildir(++) directory for each user. Each user has a system account. The Maildir of each user is owned by the user's system account and group read/writable by the group mail (hence mail_access_groups=mail). Relevant parts of my config: mail_plugins = acl mail_location = maildir:/home/dovecot/%u mail_access_groups = mail namespace { type = private separator = / prefix = inbox = yes hidden = no subscriptions = yes } namespace { type = shared separator = / prefix = shared/%%u/ location = maildir:/home/dovecot/%%u:INDEX=/home/dovecot/%u/shared/%%u subscriptions = no list = children } protocol imap { mail_plugins = $mail_plugins imap_acl } plugin { acl = vfile } plugin { acl_shared_dict = file:/home/dovecot/shared-mailboxes } When I try to create an ACL in a telnet session, the command fails with an internal error. The log shows: dovecot: imap(michael): Error: fstat(/home/dovecot/michael/.test/dovecot-acl.lock) failed: No such file or directory dovecot: imap(michael): Error: file_dotlock_open(/home/dovecot/michael/.test/dovecot-acl) failed: No such file or directory The error occurs whether a (manually created) dovecot-acl file exists or not. The dovecot-acl.lock file is created by not removed afterwards. Subsequent setacl commands will timeout waiting for the lock to be released until I delete it manually. If I create the dovecot-acl file manually and provide access to another user, the getacl command will correctly show the permissions and the other user can access the folder. setacl will still fail to modify the acl file, however (same error). Another thing that irritates me is that dovecot seems to use the dotlock locking method, although I explicitly set lock_method to fcntl (also tried flock, same behavior). I'm not using chroot. I appreciate any help to get this sorted out. Thanks, Michael

3 6

[Dovecot] LDAP Lookup not returning value in maxStorage
by Bruce, Andrew 26 Apr '12

26 Apr '12

Hi there, We're setting up a Dovecot virtual email setup - we've got everything working perfect with LDAP logins authenticating against AD and so forth, but we're having issues with retrieving the maxStorage value from AD (this is a pre-setup field in AD that we'd like to use to set per user quotas). In our LDAP lookup, we have the maxStorage entry listed under user_attrs for the quota (user_attrs = maxStorage=quota_rule=*:storage=%$M), and in the debug logs, can see it trying to get the entry, but it fails with: Mar 27 13:19:27 auth: Debug: ldap(username(a)site,192.168.1.5): user search: base=dc=site,dc=local scope=subtree filter=(&(objectClass=person)(| (userPrincipalName=username@site) (|(mail=username@site)(samAccountName=username@site)))) fields=maxStorage Mar 27 13:19:27 auth: Debug: ldap(username(a)site,192.168.1.5): no fields returned by the server At this point, we then see the default quota applied. If we change the name of the field from maxStorage to instanceType we see the value show up in the logs and passed through to the quota system and applied successfully: Mar 27 11:09:01 auth: Debug: ldap(username(a)site,192.168.1.5): user search: base=dc=site,dc=local scope=subtree filter=(&(objectClass=person)(| (userPrincipalName=username@site) (|(mail=username@site)(samAccountName=username@site)))) fields=instanceType Mar 27 11:09:01 auth: Debug: ldap(username(a)site,192.168.1.5): result: instanceType(quota_rule=*:storage=%$M)=*:storage=4M Mar 27 11:09:01 auth: Debug: master out: USER 3901227009 username@site quota_rule=*:storage=4M Which seems a bit weird. If we use ldapsearch and pass it the same search string and look for the field maxStorage, we clearly see the field and the value being returned. The result looks the same if we also lookup instanceType. We're using Dovecot 2.0.9. Does anyone have any idea as to why we can't use this field? Thanks, Andrew

4 7

[Dovecot] virtual plugin and shared namespace
by l.chelchowski＠eurocar.pl 23 Apr '12

23 Apr '12

Hi, I have a problem with virtual plugin and geting mails form shared namespace. dovecot-virtual: ---- Shared/* Public/* * unseen ---- dovecot.conf: ---- namespace { inbox = yes location = prefix = separator = / type = private } namespace { list = children location = maildir:/home/vmail/public/:CONTROL=/var/mail/vmail/%d/%u/control/public:INDEX=/var/mail/vmail/%d/%u/index/public:LAYOUT=fs prefix = Public/ separator = / subscriptions = yes type = public } namespace { list = children location = maildir:%%h/:INDEX=/var/mail/vmail/%d/%u/index/shared/%%u prefix = Shared/%%u/ separator = / subscriptions = no type = shared } namespace { list = children prefix = Virtual/ separator = / location = virtual:~/virtual } ---- When I enter the virtual mailbox Unread I get this debug info: virtual mailbox Virtual/Unread: Skipping non-existing mailbox Shared/test(a)domain.pl/ Is it a bug or misconfig? -- Łukasz Chełchowski

2 2

[Dovecot] 2.1.2 Corrupted squat uidlist
by Luca Palazzo 23 Apr '12

23 Apr '12

Hi Timo and All, after upgrading to 2.1.2 i'm getting a lot of these messages: Error: Corrupted squat uidlist file XXXXXX wrong indexid I did not have them before. Ideas? Luca

4 7

[Dovecot] dbox vs. mdbox
by Douglas Mortensen 20 Apr '12

20 Apr '12

What are the pros and cons of both? Especially in regards to performance, stability, management & maintenance? I really appreciate feedback. We're on a time-crunch to migrate from a debian 5 box w/ dovecot 1.1 to a debian 6 box w/ dovecot 2.0.9 (built from source). Thanks, - Doug Mortensen Network Consultant Impala Networks Inc CCNA, MCSA, Security+, A+ Linux+, Network+, Server+ . www.impalanetworks.com P: (505) 327-7300 F: (505) 327-7545

6 12

[Dovecot] Hints for a NFS-Setup
by Patrick Westenberg 18 Apr '12

18 Apr '12

Hi everyone, as I have often trouble with OCFS2 I want to switch to NFS but I'm not sure how to rebuild my cluster with regard to locking and indexing problems. By now my I have a four server configuration (there are another 2 servers for outgoing mail but they can be ignored): MTA(MX10) --(lmtp/socket)--> local dovecot --> iSCSI-LUN with OCFS2 MTA(MX10) --(lmtp/socket)--> local dovecot --> iSCSI-LUN with OCFS2 IMAP-User <--(imap)--> IMAP-Server1 (local dovecot) <--> iSCSI-LUN/OCFS2 IMAP-User <--(imap)--> IMAP-Server2 (local dovecot) <--> iSCSI-LUN/OCFS2 As far as I understood I will get poor performance if I'd just switch from OCFS2 to NFS (while keeping this configuration) with 4 hosts accessing the NFS-share and the index files on it and it is recommended to assign users to a specific host (http://wiki2.dovecot.org/NFS). I'm uncertain what's the meaning of "user" in this context. Is it an IMAP-User or every incoming mail? An IMAP-User assigned to a specific IMAP-Server is ok for me and I could store and profit from local index files. However, I want my incoming mailservers to be equally receiving mails. Both should accept mails for every mailbox but in this case I won't have local indexes. I would appreciate any hints. Patrick

7 22

Re: [Dovecot] Dovecot 2.1 with custom OpenSSL fails to build
by Andreas M. Kirchwitz 14 Apr '12

14 Apr '12

Timo Sirainen <tss(a)iki.fi> wrote: >> $ patch -p1 -s < ../dovecot-20120303-e540404debb7.patch >> $ env SSL_CFLAGS="-I/usr/local/ssl/include" SSL_LIBS="-L/usr/local/ssl/lib -Wl,-R/usr/local/ssl/lib -lcrypto -lssl" ./configure --prefix=/usr/local/Dovecot-20120303 --with-ssl=openssl --with-ssldir=/usr/local/Dovecot-20120303/etc/dovecot/certs && make && make install > > You would have needed to run autogen.sh again. It works with me now that > I tried in a test server with OpenSSL in non-standard dir. Sorry, I didn't know that with "autogen.sh". Just grabbed Dovecot 2.1.2 (which is all properly set up - so I couldn't do anything wrong ;-) and compiled it. Compilation works. Great! The binaries find all their libraries. But two libraries are not quite okay. They don't find their SSL libs: libdovecot-lda.so libdovecot-storage.so Since libdovecot-lda.so doesn't contain the words libssl or libcrypto, I guess that ldd just complains because it uses libdovecot-storage.so. Thus, libdovecot-storage.so is the (only) one left with an incomplete library search path. Luckily, all binaries use some additional libraries which come with a proper library path. So the whole things works, but it's more like some kind of magic. It would be great if libdovecot-storage.so could be fixed as well to make things finally perfect. Thanks for all your effort. (I know this isn't top priority as most people use precompiled stuff and never run into such kind of things.) Greetings, Andreas

2 2