December 2022 - dovecot

sasl service for other app
by Henry R 13 Dec '22

13 Dec '22

can dovecot run as a general sasl service for other apps? such as webdav. Thanks.

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Backups
by Doug Hardie 11 Dec '22

11 Dec '22

I started to investigate using doveadm backup to backup my mail system. I have a small number of users and the mail store is not large. It uses maildir format. I setup a test system that is not connected to the internet and started up dovecot. I used the following command to backup one user: doveadm backup -u ben remote:test ben is the user is in the mail store. Test is the actual server name. That worked just fine. The maildir was copied completely (as best as I can tell with ls). Then I tried the second user: doveadm backup -u jean remote:test This gives 2 error messages: doveadm(jean)[]<McRYOFI0jGN1MwAAmC+70w>: Error: Mailbox INBOX: Failed to get attribute vendor/vendor.dovecot/pvt/server/sieve/files/.dovecot: Mailbox attributes not enabled doveadm(jean)[]<0IwxIlI0jGMgUwAAZU03Dg>: Error: Remote command returned error 65: ssh test doveadm dsync-server -ujean -U In addition, the maildir directories are created, but there are no emails in any of them (e.g., cur). What is the problem with the 2nd and why does it behave differently from the first? -- Doug

4 8

Sieve duplicates
by Ferenc 09 Dec '22

09 Dec '22

Hi list, I have Sieve scripts that unintentionally duplicate e-mails. My dovecot version is 2.3.4.1 (f79e8e7e4), Pigeonhole version 0.5.4 on Linux 5.4.189-2-pve x86_64 Debian 10.13. My scripts get called on an imap COPY action (imapsieve extension). The mail is fed to an external script (spam/ham training) via a pipe :copy action (vnd.dovecot.pipe extension). An header is added to keep track of what happened (editheader extension). I use "if header :contains” for my (simple) logic. If contains header X, do this, add header Y. If contains header Y, do that, add header X. I end each "if” part with keep; and stop; commands. Simple versions of this script, without the if-then construct, seem to work ok. As soon as I try to use if-then-else I find a duplicate of the processed e-mail; one that seems to be untouched, one that appears to have been processed. I hope I’m making myself clear… # without if-then require … pipe :copy … addheader … keep; # with if-then require … if header :contains pipe :copy … addheader … keep; stop; if not exists pipe :copy … addheader … keep; stop; keep; The scripts get called from for instance imapsieve_mailbox1_before. Cheers, Ferenc

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Seen Flags per User
by Maurice Kunze 08 Dec '22

08 Dec '22

Hello, i want to configure seen flags per user for shared public mailboxes in dovecot. I have added the INDEVPVT Option to the location parameter in the namespace and restarted the services and the server. Unfortunately nothing changed and there are still global seen flags in the configuration. In a post i read that i have to manually add some files to the location but this isnt specified in the documentation. below is the version we use and the config. dovecot --version 2.3.13 (89f716dc2) dovecot -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-17-amd64 x86_64 Debian 11.4 ext4 # Hostname: <SERVERNAME> auth_debug = yes auth_debug_passwords = yes auth_verbose = yes auth_verbose_passwords = plain mail_debug = yes mail_gid = vmail mail_location = maildir:/var/mail/user mail_plugins = acl mail_privileged_group = vmail mail_uid = vmail namespace { list = yes location = maildir:/var/mail/public:INDEXPVT=/var/mail/public prefix = public/ separator = / subscriptions = no type = public } namespace { list = yes location = maildir:/var/mail/user/%u/Maildir:INDEX=/var/mail/user/%u/shared/%u:CONTROL=/var/mail/user/%u/shared/%u prefix = shared/%%u/ separator = / subscriptions = no type = shared } namespace inbox { hidden = no inbox = yes list = 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 = separator = / subscriptions = yes type = private } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { acl = vfile acl_anyone = allow acl_shared_dict = file:/var/mail/database/shared-mailboxes.db } protocols = " imap" service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </var/ssl/dove.crt ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } protocol imap { mail_plugins = acl imap_acl }

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access dict in lua auth script
by Tobias Florek 08 Dec '22

08 Dec '22

Hi! I want to access a configured dictionary in a lua authentication script. Unfortunately the documentation <https://doc.dovecot.org/admin_manual/lua/> does mention a dict object but no way to get one. I also did not find any lua tests in dovecot's source code. Is using the built-in dict not supported? Cheers, Tobias Florek

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moving messages between namespaces go into purge
by Marc 07 Dec '22

07 Dec '22

I think it would be nice to have an option where the moving of messages between namespaces (by automated server scripts) would not result in messages ending up in the 'purge' queue. Currently when you move these copied messages, they end up in the purge queue combined with messages that users deleted. I am more or less forced to purge the mailbox after moving GB's while I prefer not to do this, because I would like to keep the opportunity to recover from the purge queue. Maybe there is a way to 'deduplicate' this purge queue?

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How to configure Dovecot with Keycloak correctly
by Gary Horchem 07 Dec '22

07 Dec '22

Hello I’m trying to configure Dovecot with Keycloak I’m using the proxy with password grant method. Here’s my dovecot-oauth2.plain.conf.ext grant_url = https://server-1.gary-springfield-mo.net/realms/sso/protocol/openid-connect… client_id = dovecot client_secret = WtZ5uZsBi2QPfh1EWuMWjUVGNNT4HEGR introspection_url = https://server-1.gary-springfield-mo.net/realms/sso/protocol/openid-connect… introspection_mode = post use_grant_password = yes debug = yes username_attribute = username pass_attrs = host=server-1:8181 proxy=y proxy_mech=xoauth2 pass=%{oauth2:access_token} And my dovecot-oauth2.token.conf.ext grant_url = https://server-1.gary-springfield-mo.net/realms/sso/protocol/openid-connect… client_id = dovecot client_secret = WtZ5uZsBi2QPfh1EWuMWjUVGNNT4HEGR tokeninfo_url = https://server-1.gary-springfield-mo.net/realms/sso/protocol/openid-connect… introspection_url = https://server-1.gary-springfield-mo.net/realms/sso/protocol/openid-connect… introspection_mode = post use_grant_password = no debug = yes username_attribute = username pass_attrs = pass=%{oauth2:access_token} Do I also need to configure the dovecot-oauth2.conf.ext Sent from my iPhone

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lmtp with sieve editheader Panic: file edit-mail.c: line 1809 (merge_from_parent): assertion failed
by Matthias Lay 06 Dec '22

06 Dec '22

Hi, I have experienced a crash in lmtp delivery on some mails when sieve editheader plugin is used. The first one was an "analytics mail" from azure exchange. I stripped down the mail to the relevant parts that trigger this error. log message: lmtp(johnd)<27019><VM4XLJVVj2OLaQAA/TOvIg>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7f3048ca0b72] -> /usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7f3048ca0c8e] -> /usr/lib/dovecot/libdovecot.so.0(+0xff5eb) [0x7f3048cad5eb] -> /usr/lib/dovecot/libdovecot.so.0(+0xff681) [0x7f3048cad681] -> /usr/lib/dovecot/libdovecot.so.0(+0x542c4) [0x7f3048c022c4] -> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x2e11d) [0x7f304841811d] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_memarea+0x74) [0x7f3048cb92d4] -> /usr/lib/dovecot/libdovecot.so.0(+0x10eb05) [0x7f3048cbcb05] -> /usr/lib/dovecot/libdovecot.so.0(+0x10f0a9) [0x7f3048cbd0a9] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_memarea+0x74) [0x7f3048cb92d4] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read+0x3a) [0x7f3048cb94ba] -> /usr/lib/dovecot/libdovecot.so.0(+0x112f51) [0x7f3048cc0f51] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_memarea+0x74) [0x7f3048cb92d4] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read+0x3a) [0x7f3048cb94ba] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7f3048cb9ddd] -> /usr/lib/dovecot/libdovecot.so.0(io_stream_copy+0x74) [0x7f3048cd28f4] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_send_istream+0x4f) [0x7f3048cd25ef] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_save_continue+0x29) [0x7f3048e5dd39] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_save_continue+0x20) [0x7f3048e07930] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_continue+0x3a) [0x7f3048ddff3a] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_storage_copy+0xb1) [0x7f3048dd0b71] -> /usr/lib/dovecot/libdovecot-lda.so.0(+0x475b) [0x7f3048eed75b] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x6439f) [0x7f3048de039f] -> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x52ff4) [0x7f304843cff4] -> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x473e9) [0x7f30484313e9] -> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x482a0) [0x7f30484322a0] -> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_result_execute+0x1af) [0x7f3048432fbf] -> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_multiscript_finish+0x218) [0x7f3048446f38] -> /usr/lib/dovecot/lib90_sieve_plugin.so(+0x4030) [0x7f3048ba9030] -> /usr/lib/dovecot/libdovecot-lda.so.0(mail_deliver+0x16f) [0x7f3048eee8ef] lmtp(johnd)<27019><VM4XLJVVj2OLaQAA/TOvIg>: Fatal: master: service(lmtp): child 27019 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) the sieve script only has one addheader line require ["editheader","fileinto","body", "include"]; addheader :last "X-Long-Duration" "XXX"; I will attach doveconf and the lmtp communication. inserted to lmtp with: socat - UNIX-CONNECT:$lmtp_socket <<<"$(<$file)" greetz Matze

1 0

Sieve: fileinto a subfolder of inbox
by Federico Fanton 05 Dec '22

05 Dec '22

Hi everyone! I'm trying to write a sieve script that moves emails to a *subfolder* of the inbox. My script: require ["envelope", "fileinto", "mailbox"]; if anyof( address "to" "support(a)domain.cc", address "cc" "support(a)domain.cc", envelope "to" "support(a)domain.cc" ) { fileinto :create "INBOX.support"; } But this creates a new "support" folder BESIDE the inbox, not INSIDE it. I've tried replacing "INBOX.support" with "INBOX/support" but then I get an error: "Name must not have '/' characters" Is there something else I could try? Here is the output of dovecot -n: # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-21-amd64 x86_64 Debian 10.0 ext4 auth_mechanisms = plain login lda_mailbox_autosubscribe = yes mail_location = maildir:/home/vmail/maildir/%d/%n/Maildir mail_plugins = " zlib lazy_expunge" mail_privileged_group = vmail 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 index ihave duplicate mime foreverypart extracttext namespace { hidden = yes list = no location = maildir:/home/vmail/maildir/%d/%n/Maildir/expunged prefix = .EXPUNGED/ separator = / } namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } passdb { args = scheme=SHA1 /etc/dovecot/users.conf driver = passwd-file } plugin { lazy_expunge = .EXPUNGED/ sieve = file:~/sieve;active=~/.dovecot.sieve sieve_vacation_default_period = 1d sieve_vacation_to_header_ignore_envelope = yes } protocols = imap sieve service auth { executable = /usr/lib/dovecot/auth unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0660 user = postfix } unix_listener auth-master { group = vmail mode = 0600 user = vmail } } service doveadm { inet_listener { port = 24242 } } service imap-login { process_limit = 200 } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cipher_list = ALL:!LOW:!SSLv2:ALL:!aNULL:!ADH:!eNULL:!EXP:RC4+RSA:+HIGH:+MEDIUM ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { driver = passwd } userdb { args = uid=1001 gid=1001 home=/home/vmail/maildir/%d/%n allow_all_users=yes driver = static } protocol lda { mail_plugins = " zlib lazy_expunge sieve" } protocol imap { imap_client_workarounds = delay-newmail mail_max_userip_connections = 20 } local 192.168.2.0/24 { doveadm_allowed_commands = sieve list,sieve get,sieve put,sieve activate,sieve deactivate doveadm_password = # hidden, use -P to show it } Many thanks for your time!

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Backups and disaster recovery
by GDS 04 Dec '22

04 Dec '22

Hello all! After reading some of the past threads on backups, I was wondering if I could get a sanity check... I run a Maildir configuration for a small (10 mailboxes) mail server. Using "doveadm backup", for each mailbox I do: - Weekly full backups and then copy the files to a network-based filesystem.- Daily incremental backups and then copy the files to a network-based filesystem. My recovery assumption is that in case of hardware failure, I would re-set up the mail service and for each mailbox I will recover at the right directory the latest full mailbox backup and on top of it, each incremental backup to the latest day. Does this sound like a sound strategy? Also, I was thinking of setting up a second dovecot server on another server and replicating my primary on an hourly basis to decrease recovery time. But I looked at mbsync and it seems to require mailbox login/password for each mailbox (which I don't have). Is there an alternative? Thank you!

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