- dovecot - dovecot.org

Found bug in quota-status + patch
by Thierry Coppey 03 Mar '16

03 Mar '16

Hello, I've found a bug in the quota-status util (Dovecot 2.2.21, and probably below): it always return OK (sufficient quota) because it fails to load the user properly. More specifically, the branch " if (quser == NULL) return 1; " in src/plugins/quota/quota-status.c:59 is always taken. (at least with postgresql backend, test your config with the (adapted) command below: printf "recipient=mailbox(a)example.com\nsize=10000000000\n\n" | nc inet:mailstore.example.com 12340 it should reject, unless you have no quota, or more than 10G). Therefore it is pointless to configure the quota-status service as described in http://wiki2.dovecot.org/Quota because of that bug: the mail would be always accepted from the client and rejected at the end of the (Postfix) processing by lda. It is possible to reject directly at SMTP level when the mailbox is full using Postfix and main.cf: smtpd_recipient_restrictions = ... reject_unauth_destination, ... check_policy_service inet:mailstore.example.com:12340 smtpd_end_of_data_restrictions = check_policy_service inet:mailstore.example.com:12340 However there remain a *small inconsistency* as lda will count the size of message including headers whereas smtpd_end_of_data_restrictions seems not to count them towards the message size (or additional headers might be added by other preprocessing e.g. antispam etc...) I propose the patch below to fix quota-status. Could an expert double-check that it doesn't have memory leaks? (it shouldn't but I'm not yet comfortable enough with Dovecot memory management). Best regards, Thierry C.

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Dual certificate
by Jean-Baptiste Vignaud 03 Mar '16

03 Mar '16

Hello all; Is anyone knows if it's possible to have a dual certificate setup on dovecot like in postfix or apache ? i tried to add several crts in local name section : local_name imap.server.tdl { ssl_cert = <server_rsa_crt.pem ssl_key = <server_rsa_key.pem ssl_cert = <server_ecdsa_crt.pem ssl_key = <server_ecdsa_key.pem } but it seems that dovecot takes the last one (ecdsa) and that rsa cert is not used. to check if booth are working, i check with openssl: openssl s_client openssl s_client -connect imap.server.tdl:143 -starttls imap -servername imap.server.tdl -cipher ECDHE-RSA-AES128-GCM-SHA256 for rsa and openssl s_client openssl s_client -connect imap.server.tdl:143 -starttls imap -servername imap.server.tdl -cipher ECDHE-ECDSA-AES128-GCM-SHA256 for ecdsa In apache we have to duplicate the cert / key lines one for rsa, one for edcda. In postfix, we have some specific ecdsa conf keys. So is there a way to do the same in dovecot ?

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Deleting / Removing users
by John Krug 03 Mar '16

03 Mar '16

i have a list of users that I’ve removed from LDAP and I want to delete their mail storage. sdbox Dovecot 2.2.15.8 I have mail messages in one location and indexes in another. Should I just rm -rf /messages/<username> rm -rf /indexes/<username> Thanks, JK ----------------------------------------------------------------------- John "JK" Krug System Administrator The University of Chicago | Laboratory Schools 1362 East 59th Street | Chicago, IL 60637 Phone: (773) 834-4476 jk(a)ucls.uchicago.edu <mailto:jkallo@ucls.uchicago.edu> | http://helpdesk.ucls.uchicago.edu _______________________________________________

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Get mailbox from its guid through IMAP
by Peter Chiochetti 02 Mar '16

02 Mar '16

In the shell I'do: doveadm fetch -u bob mailbox mailbox-guid $box uid 1 Is there a way through IMAP to get the same? -- peter

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user configuration question
by Eric Abrahamsen 02 Mar '16

02 Mar '16

I've been using mbsync to sync this email account to a local Dovecot installation. I used to use Gmail, through Google Apps, and a while ago switched the account to self-hosting. I didn't want to upload years' worth of old email to my old server, so I've had two accounts in my MUA: one talking to the local Dovecot account for the old emails, and a second talking directly to the server for the new emails. I'd like to sync the new account to Dovecot as well, and I'm having trouble wrapping my brain around how to configure the two side-by-side accounts in Dovecot (I know there are other solutions to this, but I'm also just trying to figure out how this works). What I don't grok is the exact effect of the different username fields in the passdb file, and how they combine with username_format. Right now my dovecot.conf has this: passdb { driver = passwd-file args = username_format=%u /etc/dovecot/passwd } userdb { driver = static args = uid=eric gid=users home=/home/eric/.mail/%d/%n username_format=%u default_fields = mail=maildir:/home/eric/.mail/%d/%n/mail } And /etc/dovecot/passwd: eric@ericabrahamsen.net:{PLAIN}password:eric@ericabrahamsen.net Say I want to keep my existing mail where it is, and have all the new mail go into ~/.mail/ericabrahamsen.net/eric-new/mail. Ie, when mbsync connects to the local Dovecot, it does so with the username eric-new(a)ericabrahamsen.net. Now, in Dovecot's conf, do I change the email address in the first field of /etc/dovecot/passwd, or the third field, or both? And, if it isn't too much trouble, what is the difference between the two? Thanks! Eric

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Dsync induces redundant mail after rapid append/expunge repeatedly
by 潘信傑 02 Mar '16

02 Mar '16

I meet the problem about dsync with expunge. The problems is expunged mail would reappear after dsyncing and it is easily to reproduce. Environment Settings: - Two servers(serverA, serverB) both enabled plugin "*replication"* - And more detail get by "dovecot -n" show below Reproduce flow: - Run two processes pA and pB both would run in while loop - pA(All behavior is on Draft mailbox and all on serverA): - Clean "Draft" mailbox of userA - Run the following imap command of userA - imap save (save new mail to Draft) - imap delete (delete old mail on Draft) - imap expunge * - Check if draft only have one email (it would be failed in about 50 loops)* - pB(Send mail to serverB): - Send new mail to userA (which would be save in INBOX) It would be easier reproduce by increasing server loading. I have found something - T he expunge changes from server A in dsync connection don't send immediately, these expunge changes appear after 1~2 dsync connection over. - The replicated mail is generated from serverB and sync back to serverA so expunged mail reappeared. dovecot -n (ServerA) # 2.2.19: /etc/dovecot/dovecot.conf # OS: Linux 3.10.77 x86_64 ext4 auth_mechanisms = plain login default_internal_user = root default_login_user = dovecot default_vsz_limit = 0 disable_plaintext_auth = no doveadm_password = # hidden, use -P to show it dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u dsync_target_servers = tcps:10.13.23.139:24245 lda_mailbox_autocreate = yes mail_debug = yes mail_fsync = never mail_location = maildir:/var/spool/mail/%d/%-4.04i/%i/Maildir mail_max_userip_connections = 30 mail_never_cache_fields = * mail_plugins = " notify replication mail_log" 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 environment mailbox date ihave duplicate 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 { fts = lucene fts_autoindex = yes fts_lucene = whitespace_chars=@._/\~&,()[]" mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = uid box msgid size flags from subject } postmaster_address = postmaster@localhost protocols = imap pop3 lmtp imap pop3 sieve replication_dsync_parameters = -N -l 30 -U service aggregator { fifo_listener replication-notify-fifo { group = users mode = 0666 user = admin } unix_listener replication-notify { group = users mode = 0666 user = admin } } service doveadm { inet_listener { address = 10.13.23.136,127.0.0.1 port = 24245 ssl = yes } } service imap-login { inet_listener imap { address = 10.13.23.136,127.0.0.1 port = 143 } inet_listener imaps { address = 10.13.23.136,127.0.0.1 port = 993 ssl = yes } process_limit = 256 service_count = 0 } service indexer-worker { process_limit = 8 } service pop3-login { inet_listener pop3 { address = 10.13.23.136,127.0.0.1 port = 110 } inet_listener pop3s { address = 10.13.23.136,127.0.0.1 port = 995 ssl = yes } process_limit = 256 service_count = 0 } service replicator { unix_listener replicator-doveadm { mode = 0666 } } userdb { driver = passwd } protocol lda { mail_plugins = " notify replication mail_log sieve" } dovecot -n (ServerB) $ ./sbin/dovecot -n # 2.2.19: /etc/dovecot/dovecot.conf # OS: Linux 3.10.77 x86_64 auth_mechanisms = plain login default_internal_user = root default_login_user = dovecot default_vsz_limit = 0 disable_plaintext_auth = no doveadm_password = # hidden, use -P to show it dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u dsync_target_servers = tcps:10.13.23.136:24245 lda_mailbox_autocreate = yes mail_debug = yes mail_fsync = always mail_location = maildir:/var/spool/mail/%d/%-4.04i/%i/Maildir mail_max_userip_connections = 30 mail_never_cache_fields = * mail_plugins = " notify replication mail_log" managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational reg ex imap4flags copy include variables body enotify environment mailbox date ihave duplicate 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 { fts = lucene fts_autoindex = yes fts_lucene = whitespace_chars=@._/\~&,()[]" mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = uid box msgid size flags from subject } postmaster_address = postmaster@localhost protocols = imap pop3 lmtp imap pop3 sieve replication_dsync_parameters = -N -l 30 -U service aggregator { fifo_listener replication-notify-fifo { group = users mode = 0666 user = admin } unix_listener replication-notify { group = users mode = 0666 user = admin } } service doveadm { inet_listener { address = 10.13.23.139,127.0.0.1 port = 24245 ssl = yes } } service imap-login { inet_listener imap { address = 10.13.23.139,127.0.0.1 port = 143 } inet_listener imaps { address = 10.13.23.139,127.0.0.1 port = 993 ssl = yes } process_limit = 256 service_count = 0 } service indexer-worker { process_limit = 4 } service pop3-login { inet_listener pop3 { address = 10.13.23.139,127.0.0.1 port = 110 } inet_listener pop3s { address = 10.13.23.139,127.0.0.1 port = 995 ssl = yes } process_limit = 256 service_count = 0 } service replicator { unix_listener replicator-doveadm { mode = 0666 } } userdb { driver = passwd } protocol lda { mail_plugins = " notify replication mail_log sieve" } Regards, Jay Pan

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Setup changes 1.x to 2.x -- custom POP3 account handling required.
by Andrew McGlashan 02 Mar '16

02 Mar '16

Hi, Previously I did /special/ processing for some email accounts; if a particular file existed in the user's home directory, then I caused the account to use /var/mail/$USER file for POP -- otherwise it used IMAP. Now, because I adjusted the setup for POP only, IMAP still worked perfectly well. Some users have both POP and IMAP access for various reasons. The special POP processing was done using a shell script [1] in place of: /usr/lib/dovecot/pop3 - which in turn called the normal binary once setting up the environment. Now, I have been forced to upgrade my Debian from squeeze-lts to wheezy and the dovecot setup is quite different. How can I implement my /wrapper/ script for POP handling now? Here is my current setup with dovecot -n ... # 2.1.7: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-xen-amd64 x86_64 Debian 7.9 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 Items" { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = " imap pop3" service imap-login { inet_listener imap { port = 0 } } service pop3-login { inet_listener pop3 { port = 0 } } ssl = required ssl_cert = </etc/exim4/exim.crt ssl_key = </etc/exim4/exim.key userdb { driver = passwd } [1] This is the content of the original wrapper script: #!/bin/sh if [ -f $HOME/.use-mbox-for-pop3s ]; then export MAIL=mbox:$HOME/mail:INBOX=/var/mail/$USER export USER_INBOX=/var/mail/$USER if [ -f $USER_INBOX ] then export USER_INBOX_GROUP=$(stat -c %G $USER_INBOX) if [ $USER_INBOX_GROUP != $USER ] then ( date ls -l $USER_INBOX chown Debian-exim:$USER $USER_INBOX ls -l $USER_INBOX ) >> /var/log/usr-lib-dovecot--pop3-affinity.log fi fi else if [ -d $HOME/Maildir ]; then export MAIL=Maildir:$HOME/Maildir else export MAIL=mbox:$HOME/mail:INBOX=/var/mail/$USER fi fi # Finally execute the imap/pop3. If you use both, you'll need two scripts. # - this customization just for POP3S ... exec /usr/lib/dovecot/pop3 Thanks AndrewM

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dsync issues due to Prefix difference?
by Mark Little 02 Mar '16

02 Mar '16

Hi everyone, I'm hoping I am just missing something obvious - but I cannot seem to get a one-way migration dsync working between two Dovecot servers because the Prefix configuration is different. I am doing a migration from our old Dovecot servers to some new cPanel based ones. Source: 2.2.15 Dest: 2.2.21 Here is the debug output for the sync: doveadm(root): Debug: Loading modules from directory: /usr/lib/dovecot/modules/doveadm doveadm(root): Debug: Module loaded: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_sieve_plugin.so doveadm(testuser(a)example.ca): Debug: Effective uid=1322, gid=1322, home=/khstor3/khmail-mailboxes/l/li/example.ca/testuser doveadm(testuser(a)example.ca): Debug: Namespace inbox: type=private, prefix=, sep=, inbox=yes, hidden=no, list=yes, subscriptions=yes location=maildir:~/Maildir doveadm(testuser(a)example.ca): Debug: maildir++: root=/khstor3/khmail-mailboxes/l/li/example.ca/testuser/Maildir, index=, indexpvt=, control=, inbox=/khstor3/khmail-mailboxes/l/li/example.ca/testuser/Maildir, alt= doveadm(testuser(a)example.ca): Debug: Namespace : Using permissions from /khstor3/khmail-mailboxes/l/li/example.ca/testuser/Maildir: mode=0777 gid=default stdin: is not a tty dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: INBOX guid=f055ac07d79cad508a7a000075e38adc uid_validity=1353555159 uid_next=2085 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Junk guid=703a8b1d51ceab56f91e0000667eee40 uid_validity=1391566942 uid_next=1 subs=yes last_change=0 last_subs=1454100049 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Trash guid=9bee9f0f2aacb65039260000b171e44d uid_validity=1353555163 uid_next=25 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Drafts guid=4d03661058a0f1524f240000e9d81ad0 uid_validity=1391566936 uid_next=1 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Local mailbox tree: Sent guid=99ee9f0f2aacb65039260000b171e44d uid_validity=1353555161 uid_next=4 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Remote mailbox tree: INBOX guid=6460141741cfab5643470000afb0d608 uid_validity=1454100291 uid_next=2064 subs=no last_change=0 last_subs=0 dsync-local(testuser(a)example.ca): Debug: brain M: Remote mailbox tree: INBOX.Trash guid=6360141741cfab5643470000afb0d608 uid_validity=1454100290 uid_next=12 subs=yes last_change=0 last_subs=1454100289 dsync-local(testuser(a)example.ca): Debug: brain M: Remote mailbox tree: INBOX.Sent guid=6260141741cfab5643470000afb0d608 uid_validity=1454100289 uid_next=2 subs=yes last_change=0 last_subs=1454100289 dsync-remote(testuser(a)example.ca): Error: Couldn't find namespace for mailbox Junk I believe the problem is because on the source we have no prefix set, but on the destination it has INBOX as the prefix. I need to use dsync because we have many POP3 clients so I need to ensure the UIDL's are copied correctly. Here is the output from 'doveconf namespace': Source: namespace inbox { disabled = no hidden = no ignore_on_failure = no inbox = yes list = yes location = mailbox Drafts { auto = subscribe driver = special_use = \Drafts } mailbox Junk { auto = subscribe driver = special_use = \Junk } mailbox Sent { auto = subscribe driver = special_use = \Sent } mailbox "Sent Messages" { auto = no driver = special_use = \Sent } mailbox Trash { auto = subscribe driver = special_use = \Trash } order = 0 prefix = separator = subscriptions = yes type = private } Destination: namespace { disabled = no hidden = no ignore_on_failure = no inbox = yes list = yes location = mailbox Archive { auto = create autoexpunge = 0 comment = driver = special_use = \Archive } mailbox Archives { auto = no autoexpunge = 0 comment = driver = special_use = \Archive } mailbox Drafts { auto = subscribe autoexpunge = 0 comment = driver = special_use = \Drafts } mailbox Junk { auto = create autoexpunge = 0 comment = driver = special_use = \Junk } mailbox Sent { auto = subscribe autoexpunge = 0 comment = driver = special_use = \Sent } mailbox "Sent Messages" { auto = no autoexpunge = 0 comment = driver = special_use = \Sent } mailbox Trash { auto = subscribe autoexpunge = 0 comment = driver = special_use = \Trash } order = 0 prefix = INBOX. separator = subscriptions = yes type = private } If anyone could provide some assistance it would be greatly appreciated! Thanks, Mark

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where is pop3_migration_ignore_missing_uidls=yes set?
by Leon Kyneur 02 Mar '16

02 Mar '16

While doing pop3 migrations with dsync I am getting an error: dsync(user(a)domain.net): Error: pop3_migration: 2 POP3 messages have no matching IMAP messages (first POP3 msg 2638 UIDL fb3d6f3299541e695a28585f5803ed1c) - set pop3_migration_ignore_missing_uidls=yes to continue anyway dsync(user(a)domain.net): Error: Exporting mailbox INBOX failed: Can't lookup pop3-uidl for UID=3252: POP3 UIDLs couldn't be synced Can't see this is doveconf -a so it's not a setting? - tried configuring it as a plugin setting but that didn't work... Where is the correct place to set this? TIA

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Alternative storage backend for Dovecot
by Oleksandr Natalenko 01 Mar '16

01 Mar '16

Hi. We have corporate Dovecot setup with GlusterFS as file storage. We store maildirs on GlueterFS share, mounting it via NFS. Mounting share via native GlusterFS FUSE client introduces visible performance overhead. Also, NFS mount does not provide us with HA. That's why I have an idea to use GlusterFS C API to access maildirs share. I'd like to preserve maildir structure, but get access to it not via FS mount point but with GlusterFS C API calls. I've discovered that Dovecot source tree has src/lib-fs infrastructure with fs-posix implemented on top of it. Is that the right place to start from? GlusterFS C API calls are POSIX-like, so they could be easily used as substitutions for VFS ops. Could such a backend be implemented as separate plugin? Are there any examples of alternative storage backend to look at? Thanks. Regards, Oleksandr.

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