July 2024 - dovecot - dovecot.org

dovecot-2.3.2.1 and dovecot-pigeonhole-0.5.2 bug?
by Jan Nowak 16 Aug '24

16 Aug '24

Hello, we have a problem after updating the software with the operation of sieve scripts sending a copy of the e-mails, e-mails are not transferred. Configuration: dovecot-2.3.2.1 + dovecot-pigeonhole-0.5.2 + FreeBSD 11.2 log: Sep 06 13:28:17 lda(XXX@XXX)<38615><XXX+XXX>: Info: sieve: msgid=<XXX-XXX-XXX-7788-XXX@XXXXnet>: stored mail into mailbox 'INBOX' Sep 06 13:28:17 lda(XXX@XXX)<38615><XXX+XXX>: Info: sieve: Execution of script /usr/home/XXX/mail/XXX(a)XXX/.dovecot.sieve failed, but implicit keep was successful (user logfile /usr/home/XXX/mail/XXX(a)XXX/.dovecot.sieve.log may reveal additional details) .dovecot.sieve.log: error: msgid=<XXX-XXX-XXX-7788-XXX@XXXXnet>: failed to redirect message to <XXXXX(a)XXXXXX.com>: smtp(127.0.0.1:25): DATA failed: 552 Message header not CRLF terminated (permanent failure). On old configuration: dovecot 2.2 + dovecot-pigeonhole- 0.4 + FreeBSD 11.2 we don't have problem. Has anyone had a similar problem, knows the solution?

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The future of SIS
by Sebastian Marsching 16 Aug '24

16 Aug '24

Hi, I am currently in the process of planning a new deployment of Dovecot. I was planning to use mdbox or sdbox with “mail_attachment_fs = sis posix”, but I stumbled across the following notice in the documentation for Dovecot 3.0 (https://doc.dovecot.org/3.0/settings/core/#core_setting-mail_attachment_fs) > Changed in version 2.4.0 (CE): SIS is deprecated and writing of SIS files is disabled. Reading is supported for now, any missing SIS attachments are replaced with files filled with spaces. > > Changed in version 3.0.0 (Pro): SIS is deprecated and writing of SIS files is disabled. Reading is supported for now, any missing SIS attachments are replaced with files filled with spaces. And https://doc.dovecot.org/3.0/installation_guide/upgrading/from-2.3-to-3.0/ says: > Saving new mails’ attachments via fs-sis is disabled, but reading SIS attachments is still supported. Missing SIS attachments are replaced with files filled with spaces. What is not entirely clear from this comment is whether this only applied to “sis posix” or also to “sis-queue posix”. Does anybody whether sis-queue is also affected by this? I saw that the notice was added to the dovecot/documentation Git repository in April 2023, but I couldn’t find any further information there or the main branch of the dovecot/core repository. Maybe, the code for 2.4 / 3.0 has not made it into that branch or repository yet. SIS sounds like a neat concept and I would like to use it, but obviously I do not want to use a soon-to-be-deprecated feature in a completely new deployment. So, does anybody know an alternative solution for attachment deduplication (except file-system level deduplication)? Thanks, Sebastian

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vacation is not using from in envelope
by Marc 16 Aug '24

16 Aug '24

How to get dovecot use the from in sieve in the envelope?

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Strange ssl/dso troubles on freeBSD13.3
by Georg Graf 02 Aug '24

02 Aug '24

Hi, I'm George and I think I've been running dovecot for like more than a decade now without any troubles, so: WOW! Nevertheless, after an upgrade from FreeBSD 13.2 to 13.3 plus "pkg upgrade" my dovecot installation refuses to load the ssl certificates. I've tried a version built from source as well as the package. The Problem seems to be something with loading of DSO's: ========================================================================================================= Jul 31 16:42:11 murl dovecot[10801]: imap-login: Error: Failed to initialize SSL server context: Can't load SSL certificate (ssl_cert setting): error:25066067:DSO support routines:dlfcn_load:could not load the shared library: filename(libproviders.so): Shared object "libproviders.so" not found, required by "imap-login", error:25070067:DSO support routines:DSO_load:could not load the shared library, error:0E07506E:configuration file routines:module_load_dso:error loading dso: module=providers, path=providers, error:0E076071:configuration file routines:mo ========================================================================================================= I have never seen 'libproviders' and there's not a lot on it on the internet as well. Here comes my (dead-simple) 'dovecot -n': ========================================================================================================= # 2.3.21 (47349e2482): /usr/local/etc/dovecot/dovecot.conf # OS: FreeBSD 13.3-RELEASE-p4 amd64 # Hostname: murl.graf.priv.at auth_mechanisms = plain login disable_plaintext_auth = no mail_location = maildir:~/Maildir:LAYOUT=fs:INBOX=~/Maildir passdb { driver = pam } protocols = imap ssl_cert = </root/.acme.sh/graf.priv.at/fullchain.cer ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = blocking=yes driver = passwd } verbose_ssl = yes protocol imap { imap_client_workarounds = delay-newmail tb-extra-mailbox-sep } ========================================================================================================= My openssl s_client shows that the server hangs up (while producing the above log entry): ========================================================================================================= # openssl s_client -servername graf.priv.at -connect graf.priv.at:imaps CONNECTED(00000003) write:errno=0 --- no peer certificate available --- No client certificate CA names sent --- SSL handshake has read 0 bytes and written 314 bytes Verification: OK --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE No ALPN negotiated Early data was not sent Verify return code: 0 (ok) --- ========================================================================================================= Just to mention: plaintext IMAP is still working: ========================================================================================================= # telnet graf.priv.at imap Trying 78.41.116.33... Connected to graf.priv.at. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready. u login georg <mysupersecretpassword> u OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAM ESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY PREVIEW STATUS=SIZE SAVEDATE LITE RAL+ NOTIFY] Logged in r select INBOX * FLAGS (\Answered \Flagged \Deleted \Seen \Draft $Forwarded $MDNSent $label5 $label3) * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft $Forwarded $MDNSent $label5 $label3 \*)] Flags permitted. * 359 EXISTS * 0 RECENT * OK [UNSEEN 2] First unseen. * OK [UIDVALIDITY 1509040425] UIDs valid * OK [UIDNEXT 11767] Predicted next UID * OK [HIGHESTMODSEQ 19640] Highest r OK [READ-WRITE] Select completed (0.006 + 0.000 + 0.005 secs). s logout * BYE Logging out s OK Logout completed (0.001 + 0.000 secs). Connection closed by foreign host. ========================================================================================================= Any helping hint is highly appreciated! Thank you very much, George

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RE: lmtp Fatal: setresgid Operation not permitted
by Rachel Roch 31 Jul '24

31 Jul '24

>> I am getting the following error when Postfix attempts LMTP delivery : >> >> "lmtp(REDACTED)<32674><7Jm0BSVopmaifwAAbW4UVQ>: Fatal: >> setresgid(121(mailbox_user),121(mailbox_user),8(mail)) failed with >> euid=111(mailbox_user): Operation not permitted" >> >> mailbox_user is uid 111, gid 121 on my system. >> > > Not related to low uid/gid numbers? I think newer OS have their limits increased to above 1000 or so. > Well, my OS is Debian Bookworm which should be "newer" enough ? ;-) User/group were originally created via : adduser --system --disabled-login --shell /usr/sbin/nologin mailbox_user addgroup --system mailbox_user

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lmtp Fatal: setresgid Operation not permitted
by Rachel Roch 28 Jul '24

28 Jul '24

I am getting the following error when Postfix attempts LMTP delivery : "lmtp(REDACTED)<32674><7Jm0BSVopmaifwAAbW4UVQ>: Fatal: setresgid(121(mailbox_user),121(mailbox_user),8(mail)) failed with euid=111(mailbox_user): Operation not permitted" mailbox_user is uid 111, gid 121 on my system. doveconf -n ============= ============= # 2.3.19.1 (9b53102964): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.19 (4eae2f79) # OS: Linux 6.1.0-22-cloud-amd64 x86_64 Debian 12.6 xfs # Hostname: REDACTED auth_verbose = yes auth_verbose_passwords = sha1:7 doveadm_password = # hidden, use -P to show it first_valid_gid = 121 first_valid_uid = 111 imap_capability = +SPECIAL-USE imapc_features = rfc822.size fetch-headers fetch-bodystructure imapc_port = 993 imapc_ssl = imaps last_valid_gid = 121 last_valid_uid = 111 mail_location = maildir:/mnt/mxData/dovecot/%d/%n/Maildir mail_plugins = notify replication push_notification mail_privileged_group = mail 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 inbox { inbox = yes location = mailbox "Deleted Messages" { auto = no special_use = \Trash } mailbox Drafts { special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/local_sql_users.conf driver = sql } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = imap lmtp sieve service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0660 user = postfix } vsz_limit = 2 G } service doveadm { inet_listener { port = 11867 ssl = yes } } service imap-login { process_min_avail = 5 service_count = 1 } service lmtp { process_min_avail = 5 unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } user = mailbox_user } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieves { address = port = 5190 ssl = yes } } ssl = required ssl_cert = <REDACTED ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305 ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = /etc/dovecot/local_sql_users.conf default_fields = uid=mailbox_user gid=mailbox_user home=/mnt/mxData/dovecot/%d/%n driver = sql } protocol lmtp { mail_plugins = notify replication push_notification sieve } protocol lda { deliver_log_format = msgid=%m: %$ mail_plugins = notify replication push_notification sieve quota_full_tempfail = yes rejection_reason = Your message to <%t> was automatically rejected:%n%r } protocol imap { mail_max_userip_connections = 20 mail_plugins = notify replication push_notification imap_sieve } ======= ======= postconf -n ======== ======== alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases authorized_submit_users = biff = no compatibility_level = 2 default_database_type = cdb disable_vrfy_command = yes home_mailbox = Maildir/ indexed = ${default_database_type}:${config_directory}/ inet_interfaces = all inet_protocols = all mailbox_size_limit = 0 message_size_limit = 20480000 mydestination = REDACTED,localhost mydomain = REDACTED myhostname = REDACTED mynetworks = $config_directory/mynetworks mynetworks_style = subnet myorigin = $mydomain parent_domain_matches_subdomains = recipient_delimiter = + smtp_bind_address = 0.0.0.0 smtp_bind_address6 = :: smtp_sasl_auth_enable = no smtp_tls_policy_maps = ${indexed}smtp_tls_policy smtpd_banner = $myhostname ESMTP smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_sasl_auth_enable = no smtpd_sasl_local_domain = $myhostname smtpd_sasl_security_options = noanonymous smtpd_sender_restrictions = reject_unknown_sender_domain smtpd_tls_auth_only = yes smtpd_tls_cert_file = REDACTED smtpd_tls_dh1024_param_file = REDACTED smtpd_tls_eecdh_grade = strong smtpd_tls_key_file = REDACTED smtpd_tls_mandatory_ciphers = high smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtpd_tls_security_level = may tls_eecdh_strong_curve = prime256v1 tls_preempt_cipherlist = yes tls_random_source = dev:/dev/random virtual_alias_maps = pgsql:${config_directory}/pgsql_virtual.conf virtual_gid_maps = static:121 virtual_mailbox_base = /mnt/mxData/dovecot virtual_mailbox_domains = ${config_directory}/vhosts virtual_mailbox_maps = pgsql:${config_directory}/pgsql_vmap.conf virtual_transport = lmtp:unix:private/dovecot-lmtp virtual_uid_maps = static:111 ======== ========

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dovecot-lda: timeout for external scripts called by sieve
by Meinhard Schneider 28 Jul '24

28 Jul '24

Hello, I have a small problem with dovecot-lda. I am using Debian 12 Bookworm: root@lnxmail01:~# dovecot --version 2.3.13 (89f716dc2) Historically grown (probably still from sendmail times, long time ago) I always used procmail for local e-mail delivery. This also included the call for spamc for SpamAssassin. I have now changed this and set up a route via sieve. There is a small script for this: root@lnxmail01:~# cat /usr/lib/dovecot/sieve-filter/spamc-filter.sh #!/bin/bash /usr/bin/spamc My sieve configuration says (in extracts): root@lnxmail01:~# head -12 ~meini/.dovecot.sieve ## Generated by Roundcube Webmail SieveRules Plugin ## require ["body","comparator-i;ascii-numeric","copy","envelope","fileinto","imap4flags","include","regex","relational","spamtestplus","vacation","variables","spamtest"]; include :global "spamc"; # rule:[Spam] if spamtest :value "ge" :comparator "i;ascii-numeric" "5" { fileinto "Spam"; stop; } In general, this has been working for many months without any problems. But sometimes the whole thing fails due to a timeout: Jul 7 22:00:13 lnxmail01 dovecot: lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Error: program exec:/usr/lib/dovecot/sieve-filter/spamc-filter.sh (766016): Execution timed out (> 10000 msecs) Jul 7 22:00:13 lnxmail01 dovecot: lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Error: program exec:/usr/lib/dovecot/sieve-filter/spamc-filter.sh (766016): Forcibly terminated with signal 15 Jul 7 22:00:13 lnxmail01 dovecot: lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Panic: output stream (temp iostream in /tmp/dovecot.lda. for (program client seekable output)) is missing error handling Jul 7 22:00:13 lnxmail01 dovecot: lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7ff00aee04e2] -> /usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7ff00aee05fe] -> /usr/lib/dovecot/libdovecot.so.0(+0xfc49b) [0x7ff00aeec49b] -> /usr/lib/dovecot/libdovecot.so.0(+0xfc501) [0x7ff00aeec501] -> /usr/lib/dovecot/libdovecot.so.0(+0x53aee) [0x7ff00ae43aee] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_unref+0x5e) [0x7ff00af1003e] -> /usr/lib/dovecot/libdovecot.so.0(program_client_destroy+0x8e) [0x7ff00ae6ee6e] -> /usr/lib/dovecot/modules/sieve/lib90_sieve_extprograms_plugin.so(sieve_extprogram_destroy+0x18) [0x7ff00aacd8f8] -> /usr/lib/dovecot/modules/sieve/lib90_sieve_extprograms_plugin.so(+0x556d) [0x7ff00aacb56d] -> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0xea) [0x7ff00ab4c9ba] -> /usr/lib/dovecot/libdovecot-sieve.so.0(ext_include_execute_include+0x2c7) [0x7ff00ab72e17] -> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0xea) [0x7ff00ab4c9ba] -> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_multiscript_run+0x82) [0x7ff00ab62b32] -> /usr/lib/dovecot/modules/lib90_sieve_plugin.so(+0x37a3) [0x7ff00abd47a3] -> /usr/lib/dovecot/libdovecot-lda.so.0(mail_deliver+0x176) [0x7ff00b11f906] -> /usr/lib/dovecot/dovecot-lda(main+0x879) [0x55ef085e4fb9] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xea) [0x7ff00ac3ad0a] -> /usr/lib/dovecot/dovecot-lda(_start+0x2a) [0x55ef085e56ea] The worst thing is that the entire mail is lost (/dev/null)! Then I tried to set the timeout higher (than the current 10 seconds): root@lnxmail01:~# doveconf | grep -A 12 ^plugin plugin { sieve = file:~/sieve;active=~/.dovecot.sieve sieve_execute_exec_timeout = 60s sieve_extension_exec_timeout = 60s sieve_extensions = +vnd.dovecot.filter +spamtest +spamtestplus sieve_filter_bin_dir = /usr/lib/dovecot/sieve-filter sieve_filter_socket_dir = sieve-filter sieve_global = /usr/lib/dovecot/sieve-global sieve_plugins = sieve_extprograms sieve_spamtest_max_value = 5 sieve_spamtest_status_header = X-Spam-Level sieve_spamtest_status_type = strlen } I have set both the values for "sieve_execute_exec_timeout" and "sieve_extension_exec_timeout" to 60 sec, but according to the log, this does not seem to affect the 10000 msec mentioned therein. The SpamAssassin daemon has enough child processes to handle the requests (most of them were idle at the time of the error). How can I configure that the external script gets more time for execution? And what can I do so that - should the script terminate contrary to expectations or be killed in the timeout - the mail is not lost but simply processed further? Many thanks & best regards Meinhard

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Looking for Some Help with Dovecot Configuration for IMAP Access
by Selena Thomas 27 Jul '24

27 Jul '24

Hi everyone, I am having a bit of trouble setting up Dovecot for IMAP access. I’ve installed Dovecot and configured the main configuration file,, but I am not sure if I missed something important. Here’s what I have so far ::- 1. Dovecot Version: 2.3.11 2. OS: Ubuntu 20.04 3. Configuration Files: - `/etc/dovecot/dovecot.conf` - `/etc/dovecot/conf.d/10-ssl.conf` - `/etc/dovecot/conf.d/10-auth.conf` I can connect to the server, but I’m having issues with mailbox access and authentication. Does anyone have any tips or common pitfalls I should check: ?? Any guidance would be greatly appreciated..... Thanks in advance... Selena Thomas https://www.igmguru.com/cloud-computing/microsoft-azure-administrator-az-10…

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Sieve duplicate detection not working as expected
by Rosario Esposito 26 Jul '24

26 Jul '24

Hi, On a dovecot server (2.3.21) I have a simple sieve script: require ["duplicate"]; # rule:[duplicate] if duplicate { discard; stop; } I use virtual users with mail aliases on a LDAP backend. I have user "resposit" having 2 mail aliases: - resposit(a)na.infn.it - rosario.esposito(a)na.infn.it If I send a single message to both aliases I still receive 2 copies as you can see from the attached log. Is the "duplicate" sieve extension supposed to work this way ? Any help would be much appreciated ! -- Rosario Esposito

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SMTPUTF8 support
by Dāvis Mosāns 26 Jul '24

26 Jul '24

Hi, I'm interested in SMTPUTF8 support in Dovecot. It seems it's still not implemented? Any plans on implementing it? How much work would it be? I couldn't find any mention of this functionality. Postfix has support which is enabled by default but it's not usable if Dovecot doesn't support it. Thanks! Best regards, Dāvis

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