August 2019 - dovecot

How to backup maildir
by Robert Moskowitz 04 Sep '20

04 Sep '20

I have been thinking, and reading, on how to back up my mailserver. I have not found any approach that seems ready to use. I have run years without any backup, but would really like to have something in place. I figure I can attach a USB drive and backup to that, then from there rsync to something elsewhere. Further if that USB drive is a full mailserver image, I actually have a 'hot backup' where I only have to put the backup drive into a system and boot up at the last backup. But this means properly copying all of /home/vmail and probably /home/sieve plus the /var/lib/mysql Are there good tools that nicely does this? Or do I choose a time late at night (only I am sometimes in non-US timezones) to shut down all services and just use rsync? And stopping services itself is thought provoking. What if Dovecot, amavis, mysql, or whatelse is in the middle of writing out a mail file what happens to that file and restart. Just scary stuff and, in part, why I have never tackled this in the past. thanks for all feedback

4 6

imap doesn't like my passwd
by James 31 Jul '20

31 Jul '20

I spent days on this problem. I have dovecot setup to use SSL and IMAP. I also have a pop account that I had no trouble getting working. Both use PAM authentication on Linux. openssl s_client -connect localhost:993 a login test_user test_secure_password The response I got back was: a BAD Invalid characters in atom I changed the password to "abc" and it worked. The secure password used to work but it was a different architecture (x86_64 I think). The current architecture is armhf. It may be different versions of the software too. Dovecot v2.1.7

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JMAP support
by Martynas Bendorius 23 Jun '20

23 Jun '20

Hello, Is there any ETA set for JMAP support? Thank you! >> On 11/27/2016 5:28 AM, Aki Tuomi <aki.tuomi at dovecot.fi> wrote: >> Hi! >> We are working on including JMAP support to Dovecot. At this moment I cannot give any promise for exact version, but hopefully it will be part of v2.3 >> >> Aki Tuomi >> Dovecot Oy -- Best regards, Martynas Bendorius

3 2

Warning: Failed to do incremental sync
by Laura Smith 08 Apr '20

08 Apr '20

Setup dovecot sync along the lines of (https://wiki2.dovecot.org/Replication) I am doing one way replication. The initial full replication happened without issue, but now I'm seeing these errors on the slave server: doveadm: Warning: /data/mail/foo/bar/Maildir/dovecot-uidlist: Duplicate file entry at line 26397: 1562173159.M215923P17350.mxp,S=2290,W=2339 (uid 143128 -> 143142) Warning: Failed to do incremental sync for mailbox Sent Messages, retry with a full sync (Modseq 1766 no longer in transaction log (highest=17617, last_common_uid=17559, nextuid=17560)) Warning: Failed to do incremental sync for mailbox INBOX, retry with a full sync (Modseq 2540 no longer in transaction log (highest=13870, last_common_uid=19912, nextuid=19913)) I guess dovecot automatically tries a full replication because eventually the messages get pushed and "sync failed" status changes from 'y' to '-'

2 1

[Dovecot] Postfixadmin/MySQL/Dovecot 2 and quota
by Matt 01 Apr '20

01 Apr '20

Hi all, I'm setting up a new email server based on the softwares list below: * Postfix * Dovecot 2.0.9 * MySQL * Postfixadmin 2.3.6 My current problem is I'm unsure whether quota feature is well configured or not. In order to test and validate, I use Roundcubemail GUI which provides percentage of the space used by the mailbox (quota should be applied per mailbox). Here, my dovecot configuration: dovecot.conf: dict { quotadict = mysql:/etc/dovecot/dovecot-dict-quota.conf } dovecot-dict-quota.conf: connect = host=localhost dbname=postfix user=postfix password=postfix map { pattern = priv/quota/storage table = quota2 username_field = username value_field = bytes } map { pattern = priv/quota/messages table = quota2 username_field = username value_field = messages } dovecot-sql.conf.ext: driver = mysql connect = host=localhost dbname=postfix user=postfix password=postfix default_pass_scheme = PLAIN-MD5 password_query = SELECT username AS user, password, \ CONCAT('*:storage=', CAST(quota AS CHAR), 'b') AS quota_rule \ FROM mailbox WHERE username = '%u' AND active='1' user_query = SELECT maildir, 89 AS uid, 12 AS gid, \ concat('dict:storage=',floor(quota/1000),'::proxy::quotadict') AS quota, \ CONCAT('*:storage=', CAST(quota AS CHAR), 'b') AS quota_rule \ FROM mailbox WHERE username = '%u' AND active='1' conf.d/90-quota.conf: plugin { quota = dict:user::proxy::quotadict quota_rule2 = Trash:storage=+10%% } conf.d/20-imap.conf: protocol imap { mail_plugins = $mail_plugins imap_quota } When I check postfixadmin GUI, I can see that quota in realtime in quota2 table, no problem. But Roundcubemail cannot get this information and shows a unknown quota. If I add this line: quota_rule = *:storage=1G in conf.d/90-quota.conf file, it works, I mean roundcubemail gets and shows information (but not the one stored in db of course). I think I'm close to the right configuration but I need your help to complete this setup. Thank you in advance for your help. Best, Matt

7 20

intermittant passdb error
by NeuralNET 23 Jan '20

23 Jan '20

I'm having great difficulty debugging this problem.. I'm having intermittant problems connecting to dovecot. This started a couple of days ago following an apt-get update on the server. I'm running Ubuntu 14.04, dovecot 2.2.9. Here's my dovecot -n --- # 2.2.9: /etc/dovecot/dovecot.conf # OS: Linux 3.19.0-59-generic x86_64 Ubuntu 14.04.4 LTS auth_mechanisms = plain login mail_location = maildir:~/Maildir 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 { driver = pam } plugin { sieve_dir = ~/sieve } protocols = imap service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } user = $default_internal_user } ssl = required ssl_cert = </etc/dovecot/box.neuralnet.org.uk_crt.pem ssl_key = </etc/dovecot/box.neuralnet.org.uk_key.pem ssl_protocols = !SSLv2 !SSLv3 userdb { driver = passwd } --- Pretty standard stuff. In addition disable_plaintext_auth = yes is set in 10-auth.conf This showed up in the mail.err after the reboot; --- May 17 09:04:51 server dovecot: imap-login: Error: read(anvil) failed: EOF May 17 09:04:51 server dovecot: auth: Error: read(anvil-auth-penalty) failed: EOF May 17 09:04:51 server dovecot: auth: Error: net_connect_unix(anvil-auth-penalty) failed: Permission denied --- At that point The following commands were run on the server a few minutes apart with no changes made in the interim; --- username@box /etc/dovecot $ doveadm user username field valueuserdb lookup: user username doesn't exist username@box /etc/dovecot $ doveadm user username field value uid 1000 gid 1000 home /home/username mail maildir:~/Maildir system_groups_user username --- so, passdb wasn't accessible, but now it is ? Imap logins are showing in mail.log as failing, but thunderbird is currently connected; --- May 18 12:00:58 box dovecot: imap-login: Disconnected (auth failed, 3 attempts in 19 secs): user=<username>, method=PLAIN, rip=10.0.0.3, lip=10.0.0.99, TLS, session=<********> May 18 12:08:27 box dovecot: imap-login: Disconnected (auth failed, 3 attempts in 20 secs): user=<username>, method=PLAIN, rip=10.0.0.3, lip=10.0.0.99, TLS, session=<********> May 18 12:08:50 box dovecot: imap-login: Disconnected (auth failed, 3 attempts in 12 secs): user=<username>, method=PLAIN, rip=10.0.0.3, lip=10.0.0.99, TLS, session=<********> --- do I conclude that method=plain is failing, whereas method=login succeeds ? I tried setting auth_debug_password=yes and get the following; --- May 18 12:26:42 box dovecot: auth: Debug: client in: CONT#0111#011A********== (previous base64 data may contain sensitive data) May 18 12:26:42 box dovecot: auth-worker(12214): Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth May 18 12:26:42 box dovecot: auth-worker(12214): Debug: pam(expert,10.0.0.3): lookup service=dovecot May 18 12:26:42 box dovecot: auth-worker(12214): Debug: pam(expert,10.0.0.3): #1/1 style=1 msg=Password: May 18 12:26:42 box dovecot: auth-worker(12211): pam(username,10.0.0.3): pam_authenticate() failed: Authentication failure (password mismatch?) (given password: ******) May 18 12:26:44 box dovecot: auth: Debug: client passdb out: FAIL#0112#011user=username --- Any assistance debugging this further is greatly recieved! Thanks.

2 2

CentOS x64 compilation fails.
by Mart Pirita 16 Dec '19

16 Dec '19

Hello. I have problems to compile Dovecot2.2.13 with rpmbuild using options: ./configure \ --prefix=/usr \ --with-ssl=openssl \ --with-ssldir=/etc/ssl \ --sysconfdir=/etc \ --without-vpopmail \ --with-pam \ --without-bsdauth \ --without-sql \ --without-nss \ --without-ldap \ --without-pgsql \ --without-mysql \ --without-sqlite \ --with-rundir=/var/run/dovecot \ --without-deliver \ --without-gssapi make Using CentOS 5.11, option - rpmbuild -ba dovecot2.2.spec fails with error: /bin/mkdir -p '/var/tmp/dovecot-2.2.13-mp-root/usr/lib64/dovecot' /bin/sh ../../libtool --mode=install /usr/bin/install -c libdovecot-storage.la '/var/tmp/dovecot-2.2.13-mp-root/usr/lib64/dovecot' libtool: install: error: cannot install `libdovecot-storage.la' to a directory not ending in /usr/lib/dovecot make[4]: *** [install-pkglibLTLIBRARIES] Error 1 make[4]: Leaving directory `/usr/src/redhat/BUILD/dovecot-2.2.13/src/lib-storage' make[3]: *** [install-am] Error 2 make[3]: Leaving directory `/usr/src/redhat/BUILD/dovecot-2.2.13/src/lib-storage' make[2]: *** [install-recursive] Error 1 make[2]: Leaving directory `/usr/src/redhat/BUILD/dovecot-2.2.13/src/lib-storage' make[1]: *** [install-recursive] Error 1 make[1]: Leaving directory `/usr/src/redhat/BUILD/dovecot-2.2.13/src' make: *** [install-recursive] Error 1 error: Bad exit status from /var/tmp/rpm-tmp.14076 (%install) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.14076 (%install) But using CentOS 5.11with option- rpmbuild --target=i686 -ba dovecot2.2.spec works fine. However, using CentOS 6.5, with option - rpmbuild -ba dovecot2.2.spec fails with error: /bin/mkdir -p '/root/rpmbuild/BUILDROOT/dovecot-2.2.13-mp.x86_64/usr/lib64/dovecot' /bin/sh ../../libtool --mode=install /usr/bin/install -c libdovecot-storage.la '/root/rpmbuild/BUILDROOT/dovecot-2.2.13-mp.x86_64/usr/lib64/dovecot' libtool: install: error: cannot install `libdovecot-storage.la' to a directory not ending in /usr/lib/dovecot make[4]: *** [install-pkglibLTLIBRARIES] Error 1 make[4]: Leaving directory `/root/rpmbuild/BUILD/dovecot-2.2.13/src/lib-storage' make[3]: *** [install-am] Error 2 make[3]: Leaving directory `/root/rpmbuild/BUILD/dovecot-2.2.13/src/lib-storage' make[2]: *** [install-recursive] Error 1 make[2]: Leaving directory `/root/rpmbuild/BUILD/dovecot-2.2.13/src/lib-storage' make[1]: *** [install-recursive] Error 1 make[1]: Leaving directory `/root/rpmbuild/BUILD/dovecot-2.2.13/src' make: *** [install-recursive] Error 1 error: Bad exit status from /var/tmp/rpm-tmp.HP3meN (%install) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.HP3meN (%install) But when CentOS 5.11with option rpmbuild --target=i686 -ba dovecot2.2.spec suceeds, CentOS 6.5still fails: cpio: dovecot-2.2.13/src/lib-compression/abspath.c: Cannot stat: No such file or directory cpio: dovecot-2.2.13/src/lib-compression/compat.h: Cannot stat: No such file or directory cpio: dovecot-2.2.13/src/lib-compression/lib.h: Cannot stat: No such file or directory 18096 blocks + /usr/lib/rpm/check-buildroot /root/rpmbuild/BUILDROOT/dovecot-2.2.13-mp.i386/usr/lib/dovecot/dovecot-config:LIBDOVECOT='-L/root/rpmbuild/BUILDROOT/dovecot-2.2.13-mp.i386/usr/lib/dovecot -ldovecot' /root/rpmbuild/BUILDROOT/dovecot-2.2.13-mp.i386/usr/lib/dovecot/dovecot-config:LIBDOVECOT_INCLUDE=-I/root/rpmbuild/BUILDROOT/dovecot-2.2.13-mp.i386/usr/include/dovecot Found '/root/rpmbuild/BUILDROOT/dovecot-2.2.13-mp.i386' in installed files; aborting error: Bad exit status from /var/tmp/rpm-tmp.69mGY0 (%install) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.69mGY0 (%install) How to fix these errors? -- Mart

5 8

BUG: panic when using fs:posix as dict for acl_shared_dict
by Marco Giunta 13 Dec '19

13 Dec '19

Hi, I'm using Dovecot 2.2.33.2 on a RHEL 7, new installation. When I use fs:posix as dict for acl_shared_dict, like in Dovecot wiki (https://wiki.dovecot.org/SharedMailboxes/ClusterSetup) doveadm-server crash with error: # doveadm acl set -u USERNAME FOLDER user=DEST_USERNAME lookup read write-seen doveadm(USERNAME): Panic: file dict-fs.c: line 127 (fs_dict_iterate_init): assertion failed: ((flags & DICT_ITERATE_FLAG_RECURSE) == 0) doveadm(USERNAME): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0x9f3de) [0x7f0e4a4b23de] -> /usr/lib64/dovecot/libdovecot.so.0(default_fatal_handler+0x2a) [0x7f0e4a4b244a] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f0e4a44377c] -> /usr/lib64/dovecot/libdovecot.so.0(+0x31688) [0x7f0e4a444688] -> /usr/lib64/dovecot/libdovecot.so.0(dict_iterate_init_multiple+0x4d) [0x7f0e4a47cadd] -> /usr/lib64/dovecot/libdovecot.so.0(dict_iterate_init+0x29) [0x7f0e4a47cb89] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_lookup_dict_rebuild+0x3e1) [0x7f0e49a40371] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_acllist_rebuild+0x488) [0x7f0e49a3dd18] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_object_update+0x3c7) [0x7f0e49a3e867] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_mailbox_update_acl+0x68) [0x7f0e49a41e28] -> /usr/lib64/dovecot/doveadm/lib10_doveadm_acl_plugin.so(+0x2c11) [0x7f0e48da1c11] -> /usr/lib64/dovecot/doveadm/lib10_doveadm_acl_plugin.so(+0x3060) [0x7f0e48da2060] -> doveadm(+0x2b41c) [0x556f1280b41c] -> doveadm(+0x2c01a) [0x556f1280c01a] -> doveadm(doveadm_cmd_ver2_to_mail_cmd_wrapper+0x23b) [0x556f1280ce7b] -> doveadm(doveadm_cmd_run_ver2+0x50c) [0x556f1281c73c] -> doveadm(doveadm_cmd_try_run_ver2+0x37) [0x556f1281c7d7] -> doveadm(main+0x1e4) [0x556f127fb944] -> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f0e4a071c05] -> doveadm(+0x1bd35) [0x556f127fbd35] Aborted Attached coredump and configuration. I'm not a programmer, but seems that assert is raised by 'fs_dict_iterate_init' function inside 'src/lib-dict-extra/dict-fs.c': static struct dict_iterate_context * fs_dict_iterate_init(struct dict *_dict, const char *const *paths, enum dict_iterate_flags flags) { ... /* these flags are not supported for now */ i_assert((flags & DICT_ITERATE_FLAG_RECURSE) == 0); ... because it is called by 'acl_lookup_dict_iterate_read' function in file 'src/plugins/acl/acl-lookup-dict.c' static void acl_lookup_dict_iterate_read(struct acl_lookup_dict_iter *iter) { ... dict_iter = dict_iterate_init(iter->dict->dict, prefix, DICT_ITERATE_FLAG_RECURSE); ... with DICT_ITERATE_FLAG_RECURSE set. Same problem also with Dovecot 2.3.0. Thanks, Marco -- Marco Giunta - ITCS SysAdmin Via Bonomea, 265 34136 - Trieste, Italy Tel: +39-040-3787-503 Fax: +39-040-3787-244

4 6

Supporting RFC 5466 (IMAP4 Extension for Named Searches (Filters))
by Jesus Cea 06 Dec '19

06 Dec '19

I wonder if Dovecot supports RFC 5466 (IMAP4 Extension for Named Searches (Filters)) or if there is any plan about it. -- Jesús Cea Avión _/_/ _/_/_/ _/_/_/ jcea(a)jcea.es - http://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/ Twitter: @jcea _/_/ _/_/ _/_/_/_/_/ jabber / xmpp:jcea@jabber.org _/_/ _/_/ _/_/ _/_/ _/_/ "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ "El amor es poner tu felicidad en la felicidad de otro" - Leibniz

4 6

dovecot sieve duplicates detection
by André Rodier 04 Dec '19

04 Dec '19

Hello, I have tested the sieve duplicate script with success so far, but I have a question. I would like to know if the "duplicate" sieve flag in Dovecot is global to all folders, or specific to one folder only. For instance, if I copy an email from one folder to another, and I have a discard action on duplicate email, is this action will be applied (in this case, discard) or not. If the duplicate is global to all folders, is there a way to restrict the search in one folder only. Thanks for your help. André

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