dovecot

dovecot@dovecot.org

June 2024

58 participants
52 discussions

Pigenohole bad commands limits and proposed minor patch
by John Fawcett 01 Jun '24

01 Jun '24

Hi I was looking into Pigeonhole behaviour in the case of managesieve receiving invalid input either before or after login. I can see that there are hard coded limits after 3 sequential bad commands prior to authentication and 20 after authentication. I was wondering if there is a reason for those values. Sieve is a protocol that is used with software and except for the limited use case of testing it is not used by people typing manually. I don't know of a lot of sieve clients. Unfortunately the one I used in Thunderbird is no longer maintained, so I only have roundcube. But do legitimate sieve clients in general make a lot of mistakes? An additional doubt about errors that I am seeing is that differently to imap and pop3 there doen't appear to be a dedicated ssl port. I only have starttls configured. I do see what look like people trying to connect with ssl directly on port 4190, which with my configuration is never going to be valid. I am attaching a very simple proposed patch to make the error limits configurable via the following settings in conf.d/20-managesieve.conf with defaults as per the existing hard coded ones: managesieve_max_command_errors = 20 managesieve_login_max_command_errors = 3 I have similar doubts about imap error limits but I'll start with sieve ones. John

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Unable to get quotas working
by Adam Miller 01 Jun '24

01 Jun '24

Ubuntu Version: Linux 6.2.0-1017-aws x86_64 Ubuntu 22.04.4 LTS nfs4 Postfix: Version: 3.6.4 Dovecot Version: 2.3.16 (7e2e900c1a) Pigeonhole Version: 0.5.16 (09c29328) Rspamd Version: 3.8.4 Protocols: IMAP, LMTP, SMTP Setup: I have an email server running with virtual domains and virtual mailboxes that is currently hosting about 10GB of email across 15 domains and 8 mailboxes which will expand drastically once I get this to work. The server is an AWS EC2 instance with an AWS RDS instance for the database and using AWS EFS for storage. Everything works quite well except quotas! Problem: I am having an issue with getting quotas to work. When using “doveadm”, I can list the mailboxes however the “Limit” column is just a hyphen “-“ like there is no limit even though every account is set to 10GB for their limit in the database. At the same time, the actual used storage and messages is not getting updated in the database either yet there are no errors from what I can see in the logging. Configuration from “dovecot -n”: auth_debug = yes auth_mechanisms = plain login auth_verbose = yes auth_worker_max_count = 5 base_dir = /var/run/dovecot debug_log_path = /var/log/dovecot/debug.log default_internal_group = ardaemail default_internal_user = ardaemail dict { quota = mysql:/etc/dovecot/inc.d/inc.quota.user.sql.conf } info_log_path = /var/log/dovecot/info.log instance_name = ec2-us-east-1a-arda-mail-001.ardaemail.com listen = 172.16.0.200 log_path = /var/log/dovecot/general.log login_greeting = Welcome to ArdaEmail mail_debug = yes mail_gid = ardaemail mail_location = maildir:/mnt/mail/%d/%n mail_plugins = " quota" mail_uid = ardaemail maildir_stat_dirs = yes namespace inbox { inbox = yes location = mailbox Archive { auto = subscribe special_use = \Archive } mailbox Drafts { auto = no special_use = \Drafts } mailbox Junk { auto = no autoexpunge = 30 days special_use = \Junk } mailbox "Junk E-mail" { auto = no autoexpunge = 30 days special_use = \Junk } mailbox "Junk Email" { auto = no autoexpunge = 30 days special_use = \Junk } mailbox Sent { auto = no special_use = \Sent } mailbox "Sent Items" { auto = no special_use = \Sent } mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox Spam { auto = subscribe autoexpunge = 30 days special_use = \Junk } mailbox Trash { auto = no autoexpunge = 30 days special_use = \Trash } prefix = } passdb { args = /etc/dovecot/inc.d/inc.sql.conf driver = sql } plugin { imapsieve_mailbox1_before = file:/etc/dovecot/sieve.d/spam/learn-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Junk imapsieve_mailbox2_before = file:/etc/dovecot/sieve.d/spam/learn-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Junk imapsieve_mailbox2_name = * quota = dict:quota::proxy::quota quota_exceeded_message = 452 4.2.2 Mailbox is full and cannot receive any more emails recipient_delimiter = + sieve_after = /etc/dovecot/sieve.d/after/ sieve_before = /etc/dovecot/sieve.d/before/ sieve_extensions = +spamtest +spamtestplus +virustest +notify +imapflags sieve_global_extensions = +vnd.dovecot.pipe sieve_pipe_bin_dir = /etc/dovecot/sieve sieve_plugins = sieve_imapsieve sieve_extprograms sieve_quota_max_storage = 0 sieve_spamtest_max_header = X-Spam-Score: -?[[:digit:]]+\.[[:digit:]]+ / (-?[[:digit:]]+\.[[:digit:]]) sieve_spamtest_status_header = X-Spam-Score: (-?[[:digit:]]+\.[[:digit:]]+) / -?[[:digit:]]+\.[[:digit:]] sieve_spamtest_status_type = score } protocols = imap lmtp service auth-worker { group = ardaemail user = ardaemail } service auth { group = ardaemail unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { group = ardaemail mode = 0666 user = ardaemail } user = ardaemail } service imap-login { inet_listener imap { port = 0 } inet_listener imaps { port = 993 ssl = yes } } service imap { group = ardaemail user = ardaemail } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0666 user = postfix } } service pop3-login { inet_listener pop3 { port = 0 } inet_listener pop3s { port = 0 } } service submission-login { inet_listener submission { port = 0 } } ssl = required ssl_cert = </etc/letsencrypt/live/mail.ardaemail.com/fullchain.pem 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/inc.d/inc.sql.conf driver = sql } verbose_ssl = yes protocol imap { mail_plugins = " quota imap_sieve imap_quota quota" } protocol lmtp { mail_plugins = " quota sieve imap_quota quota" } Configuration for “/etc/dovecot/inc.d/inc.quota.user.sql.conf”: connect = host=mydb dbname=mydb user=mydbuser password=mydbpass map { pattern = priv/quota/storage table = mailbox username_field = email value_field = size } map { pattern = priv/quota/limit/storage table = mailbox username_field = email value_field = quota } map { pattern = priv/quota/messages table = mailbox username_field = email value_field = size_messages } map { pattern = priv/quota/limit/storage table = mailbox username_field = email value_field = quota_messages } Configuration from “/etc/dovecot/inc.d/inc.sql.conf”: driver = mysql connect = host=mydb dbname=mydb user=mydbuser password=mydbpass default_pass_scheme = BLF-CRYPT password_query = SELECT email AS user, password FROM mailbox WHERE email = '%u'; user_query = SELECT maildir AS home, 10000 AS uid, 10000 AS gid, 'dict:quota::proxy::quota' AS quota FROM mailbox WHERE email = '%u'; iterate_query = SELECT email AS username, size, 'dict:quota::proxy::quota' AS quota FROM mailbox ORDER BY domainName ASC, email ASC; Database Table: “mailbox” CREATE TABLE `mailbox` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `uuid` varchar(36) NOT NULL, `domainUuid` varchar(36) NOT NULL, `domainName` varchar(96) DEFAULT NULL, `username` varchar(96) NOT NULL DEFAULT '', `password` varchar(128) NOT NULL, `firstname` varchar(32) NOT NULL, `lastname` varchar(32) NOT NULL, `email` varchar(192) NOT NULL DEFAULT '', `maildir` text NOT NULL, `quota` bigint(24) NOT NULL DEFAULT 0, `quota_messages` bigint(24) NOT NULL DEFAULT 0, `size` bigint(24) NOT NULL DEFAULT 0, `size_messages` bigint(24) NOT NULL DEFAULT 0, `isActive` tinyint(1) NOT NULL DEFAULT 1, `createdAt` datetime NOT NULL DEFAULT current_timestamp(), `updatedAt` datetime NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(), PRIMARY KEY (`id`), UNIQUE KEY `UNIQUE_UUID` (`uuid`) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci; Where “username” is the first part of the email address and “email” is the full email address. I need to query using the full email address because of possible cross domain email addresses. Output from “doveadm quota get -A”: Username Quota name Type Value Limit % HIDDEN quota STORAGE 570742 - 0 HIDDEN quota MESSAGE 0 - 0 HIDDEN quota STORAGE 1 - 0 HIDDEN quota MESSAGE 0 - 0 HIDDEN quota STORAGE 1 - 0 HIDDEN quota MESSAGE 0 - 0 HIDDEN quota STORAGE 1068 - 0 HIDDEN quota MESSAGE 0 - 0 HIDDEN quota STORAGE 462 - 0 HIDDEN quota MESSAGE 0 - 0 HIDDEN quota STORAGE 41165 - 0 HIDDEN quota MESSAGE 0 - 0 HIDDEN quota STORAGE 1598246 - 0 HIDDEN quota MESSAGE 0 - 0 HIDDEN quota STORAGE 695776 - 0 HIDDEN quota MESSAGE 0 - 0 I have no idea what is wrong and I have been at this for over 12 hours trying to get the quotas to work. What I am expecting us when emails are delivered for the “quota” and “messages” columns in the “mailbox” table to be updated and when I run “doveadm quota get -A” to show me the current usages and limits for each mailbox. Once I have that working, I will move on to actually rejecting emails via Postfix + Dovecot LMTP when a users mailbox is full but right now, I am just trying to get this to work. Any help is greatly appreciated. Also, I tried creating an account for the mailing list but never received the email. Thank you!

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