September 2022 - dovecot

Dovecot mail-crypt webmail can't read encrypted messages
by Serveria Support 18 Oct '22

18 Oct '22

I'm trying to setup Dovecot with mail-crypt plugin with per-user encryption. I have configured mail-crypt plugin as per official guide here: https://doc.dovecot.org/configuration_manual/mail_crypt_plugin/ After that I created a user and an encrypted key by running this command: doveadm -o \plugin/mail_crypt_private_password=12345 mailbox cryptokey generate -u mail(a)example.org -URf (replacing dummy data ofc) I can log in to webmail (and Dovecot) just fine, emails are getting sent and delivered. I have also checked the storage and the messages seem to be stored encrypted. However, I can't read the emails in webmail (just headers can be seen) and in Dovecot logs I can see the following error: failed: Private key not available: Cannot decrypt key ### Cannot decrypt key ### <8632: Password not available (FETCH RFC822.HEADER) There seems to be an issue with mySQL query. The query I'm using (Select username as "user", password,"%w" as userdb_mail_crypt_private_password from mailbox;) seems to work just fine, when run from mysql prompt it outputs the usernames and passwords, but the error is still there (Cannot decrypt key ### Password not available). Any ideas? What am I missing?

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Multidomain ssl config ?
by Maurizio Caloro 16 Oct '22

16 Oct '22

on postfix now this seems to run, and with dovecot i need also handle this two domains, but appairing this error messages. like: Jun 29 20:49:28 Dovecot/imap-login: Info: Disconnected (no auth attempts in 0 secs): user=<>, rip=a.b.c.d, lip=37.120.190.188, TLS handshaking: SSL_accept() failed: error:14094416:SSL routines: ssl3_read_bytes:sslv3 alert certificate unknown: SSL alert number 46, session=<FdklDjkdfrkfi> Running with Debian Buster # dovecot --version 2.3.4.1 (f79e8e7e4) # nmail.caloro.ch local_name nmail.caloro.ch { ssl_cert = </etc/letsencrypt/live/nmail.caloro.ch/privkey.pem ssl_key = </etc/letsencrypt/live/nmail.caloro.ch/fullchain.pem } # nmail.calm-ness.ch local_name nmail.calm-ness.ch { ssl_cert = </etc/letsencrypt/live/nmail.calm-ness.ch/privkey.pem ssl_key = </etc/letsencrypt/live/nmail.calm-ness.ch/fullchain.pem } thanks for possible help

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grabbing multiple patterns from allof
by Marc 11 Oct '22

11 Oct '22

Anyone an idea how you should grab multiple matches from allof? if allof ( true, header :regex "Subject" "(test).*(test2)", envelope :matches "from" "*" )

2 1

Replacing antispam plugin with IMAPSieve not 100% correct?
by Marc 04 Oct '22

04 Oct '22

I think this page[1] is not correct If you configure this option: imapsieve_mailbox1_before = file:/usr/lib/dovecot/sieve/report-spam.sieve the file report-spam.svbin cannot be created because users cannot write there. [1] https://doc.dovecot.org/configuration_manual/howto/antispam_with_sieve/#how…

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Matching Addresses in Sieve
by Doug Hardie 01 Oct '22

01 Oct '22

I have an email with the following header line: From: 'Thank you!Kohls' <Kohls-MNc(a)FeedbackKohlsOpinionRequestedlxecrftHO.com> I am trying to match that with: if address :contains "from" "Thank you!Kohls" { addflag "\\Seen"; fileinto "Junk"; stop; } However, the matching portion of the from address is only the section between < and >. Since there are changing sections that are different for each email, I can't use that. I wanted to match the stuff before <. I have tried numerous formats for the if statement but none of them have worked. What is the proper way to make that match work? Thanks, -- Doug

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new feature: sieve forward plugin
by Marc 26 Sep '22

26 Sep '22

As this page[1] describes a more often occurring problem of forwarding messages from servers that are not included in the spf records. Maybe there should be a plugin that offers this forward functionality. Something like get the spf records of the sender check if there is a -all then apply the sender substitution. https://doc.dovecot.org/configuration_manual/sieve/configuring_auto_forward…

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Vmail Home
by Silvio Siefke 26 Sep '22

26 Sep '22

Hello, I use Opensmtpd with Dovecot LMTP. All this run but one point I not understand. I use Virtual Users, with System User vmail, home is /var/vmail but dovecot stored message in path /home/vmail/<domain>/user. In configuration files is /var/vmail (dovecot users). Thx for help Silvio ---- cat /etc/passwd | grep vmail vmail:x:2000:2000:Vmail Directory and User:/var/vmail:/usr/sbin/nologin ---- dovecot -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-18-amd64 x86_64 Debian 11.5 # Hostname: asia.sisi-systems.ovh default_vsz_limit = 1 G doveadm_password = # hidden, use -P to show it doveadm_port = 20000 mail_gid = vmail mail_location = maildir:~/Maildir mail_plugins = " notify replication" mail_privileged_group = vmail mail_uid = 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 imapsieve vnd.dovecot.imapsieve namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = scheme=SHA512-CRYPT username_format=%u /etc/dovecot/users driver = passwd-file } plugin { imapsieve_mailbox1_before = file:/var/vmail/sieve/global/learn-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Spam imapsieve_mailbox2_before = file:/var/vmail/sieve/global/learn-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Spam imapsieve_mailbox2_name = * mail_replica = tcp:192.168.1.112 quota = maildir:User quota quota_exceeded_message = Benutzer %u hat das Speichervolumen überschritten. / User %u has exhausted allowed storage space. sieve = file:/var/vmail/sieve/%d/%n/scripts;active=/var/vmail/sieve/%d/%n/active-script.sieve sieve_before = /var/vmail/sieve/global/spam-global.sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment sieve_pipe_bin_dir = /usr/bin sieve_plugins = sieve_imapsieve sieve_extprograms } protocols = lmtp imap pop3 sieve service aggregator { fifo_listener replication-notify-fifo { user = vmail } unix_listener replication-notify { user = vmail } } service doveadm { inet_listener { port = 20000 } } service imap-login { inet_listener imap { port = 143 } vsz_limit = 1 G } service lmtp { unix_listener lmtp { group = vmail user = vmail } } service managesieve-login { inet_listener sieve { port = 4190 ssl = yes } } service managesieve { process_limit = 1024 } service pop3-login { inet_listener pop3 { port = 110 } inet_listener pop3s { port = 995 ssl = yes } } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0600 user = vmail } } ssl = required ssl_cert = </etc/lego/certificates/imap.sisi-systems.ovh.crt 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 ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 userdb { args = username_format=%u /etc/dovecot/users driver = passwd-file override_fields = uid=vmail gid=vmail home=/home/vmail/%d/%n } protocol imap { imap_idle_notify_interval = 29 mins mail_max_userip_connections = 20 mail_plugins = " notify replication quota imap_quota imap_sieve" } protocol lmtp { mail_plugins = " notify replication sieve notify push_notification" postmaster_address = network(a)sisi-systems.ovh } protocol pop3 { mail_max_userip_connections = 10 mail_plugins = " notify replication" }

2 1

Custom post login scripting variables via ID command
by hi＠zakaria.website 26 Sep '22

26 Sep '22

Hi there, I wonder if dovecot would consider this feature request. In post login scripting, given USER, IP, LOCAL_IP, and userdb lookup fields, are only available, I want to push additional variables from web mail to dovecot using ID commands yet I looked at the source in imap-login-cmd-id.c and script-login.c it seems to be possible while I'm not an expert in C and IMAP standards and not sure if its something would break the standards. I hope the dev team to consider this and if anyone have a workaround or an idea with I can start to patch a workaround myself, please let me know as it would be very much appreciated. With thanks. Zakaria.

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what sieve variables / syntax is available to sieve scripts.
by Marc 25 Sep '22

25 Sep '22

1. where can I find all variables like "imap.user" like in mentioned on page[2] 2. I have the impression that variables like "${from}" are all being set from scanning the whole email again seeing these "if matches" statements. Is that not super inefficient? I would assume that such variables would be set and made available upon the receipt of a message. 3. What is the point of this: if environment :matches "imap.user" "*" { set "username" "${1}"; } pipe :copy "sa-learn-ham.sh" [ "${username}" ]; Why can't I just use: pipe :copy "sa-learn-ham.sh" [ "imap.user" ]; [1] require [ "vnd.dovecot.pipe", "copy", "variables" ]; if header :matches "subject" "*" { set "subject" "${1}"; } if header :matches "from" "*" { set "from" "${1}"; } pipe :args [ "USER(a)DOMAIN.TLD", "${from}", "${subject}" ] :copy :try "jabber_notify.sh" ; from page https://wiki.dovecot.org/Pigeonhole/Sieve/Plugins/Pipe [2] if environment :matches "imap.user" "*" { set "username" "${1}"; } pipe :copy "sa-learn-spam.sh" [ "${username}" ]; https://doc.dovecot.org/configuration_manual/howto/antispam_with_sieve/#how…

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test sieve plugin(?) development
by Marc 24 Sep '22

24 Sep '22

Say for testing purposes I would like to add sender email addresses to a database file (eg gdbm) per user. How would I go about doing this? Do I need to create something like in https://github.com/dovecot/pigeonhole/tree/src/lib-sieve/plugins Or can I just create a go binary, and parse data to it? Is there not something like a hello world example for this?

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