February 2011 - dovecot

[Dovecot] Dovecot Or Debian, Boot-Time Error "Can't assign requested address"
by Sabahattin Gucukoglu 06 Feb '11

06 Feb '11

Hi all, I have a really weird problem, which for now I have solved by just binding to the IPv6 wildcard address "::". Using the latest packages from Debian unstable (1.x series), I set up a tunnel with tunnelbroker.net for IPv6. I assign two of the delegated addresses in my /48 using IP aliases in /etc/network/interfaces to my ethernet interface (eth0 and eth0:1). All other servers start and run, binding to the primary address (eth0) assigned. The packet forwarder is not necessary, so it isn't turned on using sysctl. But Dovecot will only start if I launch it using the init script after boot. Until then, in syslog there is always: Fatal: listen(2001:470:xxxx::1): Can't assign requested address Anybody have the slightest clue what's going on here? Debian bug, or Dovecot? I suspect some problem with initscript order, yet inspection shows no apparent problem; network starts up before services. Very, very odd. Cheers, Sabahattin

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[Dovecot] Splitting up mail_location setting?
by Timo Sirainen 06 Feb '11

06 Feb '11

mail_location setting has started becoming a bit bloaty. I'm not actually even sure why I've kept adding more parameters to it rather than just adding new settings. It's also caused confusion, because people try things like: mail_location = mbox:/var/mail/%u mail_location = mbox:INBOX=/var/mail/%u Although the first one has been giving ok enough error message for a long time now and the second one also will give in v2.0.10, it still would be nicer if there wasn't any need for such confusion at all. The settings could instead be: mail_format = mbox mail_inbox_path = /var/mail/%u Then Dovecot could complain about mail_root_path being empty, which would be more understandable.. The mail_location setting itself would keep working probably forever for backwards compatibility (and also in some setups it would be difficult to split it when it comes from LDAP/SQL), although some of its parameters could maybe be dropped after a while (SUBSCRIPTIONS, DIRNAME, MAILBOXDIR). So if you did e.g.: mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_root_path = ~/mail2 The result would be same as mbox:~/mail2:INBOX=/var/mail/%u. Although this can also result in probably unwanted situation: mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_format = maildir mail_root_path = ~/Maildir Now the result would be maildir:~/Maildir:INBOX=/var/mail/%u. This can be avoided by setting mail_inbox_path="" explicitly. Or the other way around: mail_inbox_path = /var/mail/%u mail_location = maildir:~/Maildir:INBOX= Without the INBOX= the mail_inbox_path would be in use. Below are the setting names I thought about using: a) mail_location = maildir:~/Maildir:INBOX=~/Maildir/.INBOX:INDEX=~/indexes:CONTROL=~/control:LAYOUT=fs:SUBSCRIPTIONS=courier-subscriptions mail_format = maildir mail_root_path = ~/Maildir mail_inbox_path = ~/Maildir/.INBOX mail_index_path = ~/indexes mail_control_path = ~/control mail_directory_layout = fs mail_subscriptions_fname = courier-subscriptions b) mail_location = mdbox:~/mdbox:ALT=/alt/%u:LAYOUT=fs:DIRNAME=dbox-Mails:MAILBOXDIR=mailboxes mail_format = mdbox mail_root_path = ~/mdbox mail_alt_path = /alt/%u mail_dir_name = dbox-Mails mail_mailboxes_dir_name = mailboxes Thoughts?

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Re: [Dovecot] Samba AD and Dovecot
by Jason Gunthorpe 06 Feb '11

06 Feb '11

On Fri, Feb 04, 2011 at 01:47:31PM -0700, Trever L. Adams wrote: > > There was a thread a month or so ago on how to do GSSAPI with AD and > > dovecot kerberos. It works great, and I highly recommend it for AD > > sites. Check the archives, it isn't really too hard. > I am not finding this. Do you happen to remember the subject? No, but it is pretty simple using latest everything (well, Debian squeeze).. Basically from scratch.. Notice this also sets up NTLM, which is supported by many roaming devices (ie phones). 1) Put this or similar in /etc/samba/smb.conf [global] workgroup = $NT_WORKGROUP$ realm = $REALM$ security = ads kerberos method = secrets and keytab 2) Confirm that hostname gives an unqualified name and hostname -f gives a fully qualified name. Confirm you have DNS setup properly (eg dig -t SRV _kerberos._udp.$REALM$ works OK) 3) Join the machine to AD $ net ads join -U 'user with AD privs' $ kinit AD_USER $ kvno host/`hostname -f` 4) Setup imap SPN: $ net ads keytab add imap $ net ads search cn=`hostname` | grep servicePrincipalName $ klist -k $ kvno imap/`hostname -f` The last three should report imap/`hostname -f` entries. 5) Setup dovecot.. Set these things in the config auth_use_winbind = yes mechanisms = plain gssapi gss-spnego login ntlm 6) Setup exim.. $ net ads keytab add smtp Use these in the dovecot config: client { path = /var/run/dovecot/auth-client mode = 0660 group = Debian-exim } } And this at the end of the exim.conf: dovecot_plain: driver = dovecot public_name = PLAIN server_socket = /var/run/dovecot/auth-client server_set_id=PLAIN-${quote:$auth1} dovecot_ntlm: driver = dovecot public_name = NTLM server_socket = /var/run/dovecot/auth-client server_set_id=NTLM-${quote:$auth1} dovecot_gssapi: driver = dovecot public_name = GSSAPI server_socket = /var/run/dovecot/auth-client server_set_id=GSSAPI-${quote:$auth1} dovecot_gssapi_spnego: driver = dovecot public_name = GSS-SPNEGO server_socket = /var/run/dovecot/auth-client server_set_id=GSS-SPNEGO-${quote:$auth1} 7) Setup openssh in sshd_config GSSAPIAuthentication yes GSSAPICleanupCredentials yes GSSAPIStrictAcceptorCheck yes Jason

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[Dovecot] Best filesystem?
by Monika Janek 05 Feb '11

05 Feb '11

Hi everyone! What's the best filesystem to use for the mail spool? I'm debating between Debian with xfs or FreeBSD with zfs. I'm not sure which way to go. I'm migrating from cyrus. I have about 50 users so it's not a large setup. Cheers! Monika -- Monika Janek Systems Administrator, Side Effects Software Toronto, Ontario Canada 416-504-9876 x207 www.sidefx.com

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[Dovecot] Question about managing multiple domains
by Sergio Moscoso 04 Feb '11

04 Feb '11

Actually we have configured a server (postfix,dovecot,mysql) with multiple domains, but the problem resides in that we don't want to login via POP3 using "user@domain" just using "user", because we'll migrate our actual platform (Qmail) to dovecot. Our users are logging to their mail boxes, using only user name. We want to ask if that's posible to use a function like a "vipmap" in qmail, that allow to map an IP address to a domain. We're using the dovecot 1.0.7, the configuration shows as follows: login_dir: /var/run/dovecot/login login_executable(default): /usr/libexec/dovecot/imap-login login_executable(imap): /usr/libexec/dovecot/imap-login login_executable(pop3): /usr/libexec/dovecot/pop3-login first_valid_uid: 100 mail_location: maildir:~/Maildir/ mail_executable(default): /usr/libexec/dovecot/imap mail_executable(imap): /usr/libexec/dovecot/imap mail_executable(pop3): /usr/libexec/dovecot/pop3 mail_plugin_dir(default): /usr/lib64/dovecot/imap mail_plugin_dir(imap): /usr/lib64/dovecot/imap mail_plugin_dir(pop3): /usr/lib64/dovecot/pop3 imap_client_workarounds(default): delay-newmail outlook-idle netscape-eoh imap_client_workarounds(imap): delay-newmail outlook-idle netscape-eoh imap_client_workarounds(pop3): outlook-idle pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh auth default: username_format: %Lu passdb: driver: sql args: /etc/dovecot-mysql.conf userdb: driver: static args: uid=101 gid=102 home=/home/vmail/%d/%n We'll apreciate your response, 'cause we coulnd't find information about this issuet and we didn't to find any clue that shows how can realize it. Thank you in advance. Sergio Moscoso

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[Dovecot] EUID not changing when delivering to a mailbox
by rastik＠tereus.eu 04 Feb '11

04 Feb '11

Hello, I've set up virtual mailboxes and I'm using one uid/gid pair (mail/mail) to deliver almost all messages. Some accounts I'd like to have accessible by local Linux accounts as well, so postfix is delivering them using separate uids (gid stays the same). But I run into a problem when dovecot auth correctly fetches uid/gid from MySQL database, but still uses general mail uid to access the mailbox instead of user uid. This is what I have in dovecot log: dovecot: auth(default): client in: AUTH 1 PLAIN service=imap secured lip=myipaddr rip=myipaddr lport=143 rport=55513 dovecot: auth(default): client out: CONT 1 dovecot: auth(default): client in: CONT<hidden> dovecot: auth-worker(default): sql(joe(a)mydomain.com,myipaddr): query: SELECT CONCAT('/var/mail/', maildir) AS userdb_home, username as user, password, CONCAT('*:bytes=', quota) AS userdb_quota_rule, uid, gid FROM mailbox WHERE username = 'joe(a)mydomain.com' AND active = 1 dovecot: auth(default): client out: OK 1 user=joe(a)mydomain.com uid=1000 gid=12 dovecot: auth(default): master in: REQUEST 11 17252 1 dovecot: auth(default): prefetch(joe(a)mydomain.com,myipaddr): success dovecot: auth(default): master out: USER 11 joe(a)mydomain.com home=/var/mail/mydomain.com/joe/ quota_rule=*:bytes=-1 dovecot: imap-login: Login: user=<joe(a)mydomain.com>, method=PLAIN, rip=myipaddr, lip=myipaddr, TLS dovecot: IMAP(joe(a)mydomain.com): opendir(/var/mail/mydomain.com/joe/Maildir) failed: Permission denied (euid=8(mail) egid=12(mail) missing +r perm: /var/mail/mydomain.com/joe/Maildir) dovecot: IMAP(joe(a)mydomain.com): stat(/var/mail/mydomain.com/joe/indexes/.INBOX) failed: Permission denied (euid=8(mail) egid=12(mail) missing +x perm: /var/mail/mydomain.com/joe/indexes) dovecot: IMAP(joe(a)mydomain.com): file_dotlock_create(/var/mail/mydomain.com/joe/Maildir/dovecot-uidlist) failed: Permission denied (euid=8(mail) egid=12(mail) missing +w perm: /var/mail/mydomain.com/joe/Maildir) dovecot: IMAP(joe(a)mydomain.com): opendir(/var/mail/mydomain.com/joe/Maildir/new) failed: Permission denied (euid=8(mail) egid=12(mail) missing +r perm: /var/mail/mydomain.com/joe/Maildir/new) dovecot: IMAP(joe(a)mydomain.com): stat(/var/mail/mydomain.com/joe/indexes/.INBOX) failed: Permission denied (euid=8(mail) egid=12(mail) missing +x perm: /var/mail/mydomain.com/joe/indexes) dovecot: IMAP(joe(a)mydomain.com): file_dotlock_create(/var/mail/mydomain.com/joe/Maildir/dovecot-uidlist) failed: Permission denied (euid=8(mail) egid=12(mail) missing +w perm: /var/mail/mydomain.com/joe/Maildir) ricola dovecot: IMAP(joe(a)mydomain.com): opendir(/var/mail/mydomain.com/joe/Maildir/new) failed: Permission denied (euid=8(mail) egid=12(mail) missing +r perm: /var/mail/mydomain.com/joe/Maildir/new) dovecot: IMAP(joe(a)mydomain.com): Disconnected: Logged out bytes=171/775 My configuration is: # 1.2.16: /etc/dovecot/dovecot.conf # OS: Linux 2.6.36-hardened-r6 x86_64 Gentoo Base System release 2.0.1 ext4 listen: *, [::] ssl_cert_file: /etc/ssl/dovecot/server.pem ssl_key_file: /etc/ssl/dovecot/server.key login_dir: /var/run/dovecot/login login_executable: /usr/libexec/dovecot/imap-login first_valid_uid: 8 last_valid_uid: 1999 first_valid_gid: 12 last_valid_gid: 12 mail_privileged_group: mail mail_uid: 8 mail_gid: 12 mail_location: maildir:/var/mail/%d/%n/Maildir/:INDEX=/var/mail/%d/%n/indexes lda: postmaster_address: postmaster(a)mydomain.com mail_plugins: quota auth default: mechanisms: plain login user: nobody verbose: yes debug: yes passdb: driver: sql args: /etc/dovecot/dovecot-sql.conf userdb: driver: prefetch userdb: driver: sql args: /etc/dovecot/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: mail group: mail I'm not sure if I got the concept correctly, but I was expecting that dovecot will use uid from the database. I was not able to find any relevant information in the archives. If it was explained already in the past, please send me some keywords that would help me find it. Thank you, Rastislav Wartiak

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[Dovecot] INBOX in mbox format and IMAP folders in maildir format ?
by Frank Bonnet 04 Feb '11

04 Feb '11

Hello Would it be possible to setup such configuration ? INBOX in /var/mail/ using MBOX format IMAP folders in Maildir format Thanks a lot !

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[Dovecot] Dovecot 2 multiple address/port binding
by Thomas Hummel 04 Feb '11

04 Feb '11

Hello, Sorry, I know the topic has been talked about already but I searched the archives and I'm still unsure of the proper way to have dovecot (imap-login) listen to several addresses and/or several ports. 1. how do I translate dovecot-1 protocol imap { listen = xx.xx.xx.xx:143 yy.yy.yy.yy:143 ssl_listen = xx.xx.xx.xx:993 yy.yy.yy.yy:939 } I started by service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } but I don't know if I should add multiple "address" lines, other inet_listener {} sections, or multiple address on the same "address" line. 2. besides I don't know if it's possible to listen on the same address to several ports for the same "subservice" : for instance could I have an inet_listener imap {} listen on zz:zz:zz:zz:port1 and zz:zz:zz:zz:port2 ? Thanks -- Thomas Hummel | Institut Pasteur <hummel(a)pasteur.fr> | Pôle informatique - systèmes et réseau

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[Dovecot] Ldap and secondary PosixGroups
by Matthieu Ambrosy 04 Feb '11

04 Feb '11

Hello all, I'm using "Pam Ldap" for my users (Debian Lenny). getent passwd : *m.ambrosy:x:2000:100:m.ambrosy:/home/m.ambrosy:/bin/bash* getent group : *l_admin:*:2000:m.ambrosy l_personnel:*:2001:m.ambrosy l_mail:*:2003:m.ambrosy* As you can see, in LDAP, user "m.ambrosy" (PosixAccount) is defined with gidNumber = 100 (local group "users") and uidNumber = 2000. Furthermore this user belongs to 3 secondary Ldap PosixGroup (l_admin 2000, l_personnel 2001, l_mail 2003). If /var/mail belongs to the primary group (100), no problem. If /var/mail belongs to l_mail (2003) : *mkdir(/var/mail/m.ambrosy) failed: Permission denied (euid=2000(m.ambrosy) egid=100(users) missing +w perm: /var/mail, euid is not dir owner* In fact, Dovecot seems to not see secondary groups for my user. It just checks the primary group (gidNumber). If I modify my Ldap user like this, getent passwd : *m.ambrosy:x:2000:2003:m.ambrosy:/home/m.ambrosy:/bin/bash *It works fine but my "l_mail" group must be secondary (like an option for some users), not the primary gidNumber. Can I do it in the conf file?* * Am I making myself clear? Regards, Matthieu.

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[Dovecot] Improving lmtp performance
by Joseba Torre 04 Feb '11

04 Feb '11

Hi, yesterday I migrated and old version with sendmail + courier to a virtual machine (vmware) with postfix and dovecot 2.0.9. Everything worked fine, but with a more or less default setup for both dovecot and postfix, lmtp performance was pretty bad: a message was written to an inbox every 2 or 3 seconds. With that rate and a 5000+ and growing mail queue mail delivery was really slow. After searching both the wiki and this list I didn't find anything related to this. I tried a couple of things, and finally added process_min_avail = 10 to service lmtp entry in 10-master.conf and local_destination_concurrency_limit = 10 in postfix's main.cf Now mail delivery is really fast, and my mail queue was delivered in a very sort time. Is this the right solution, or there's a better setup to improve mail delivery performance? Also, if this is a common problem, may be something should appear in http://wiki2.dovecot.org/LMTP Thanks. -- Joseba Torre. Vicegerencia de TICs, área de Explotación

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