December 2024 - dovecot

Missing IMAP METADATA Plugin
by Adam Miller 23 Aug '25

23 Aug '25

OS: Ubuntu 22.04.1 Dovecot: 2.3.16 (7e2e900c1a) When trying to enable the “imap_metadata” plugin, I get the following error: Plugin 'imap_metadata' not found from directory /usr/lib/dovecot/modules I have searched high and low via Google, StackOverflow and even ChatGPT (haha) but I cannot seem to find the package that provides the plugin. Does Dovecot have to be built from source for this plugin to be included? Any help is appreciated. Thank you!

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[Patch] Allow sieve redirects to specified domains only
by Kadlecsik József 10 Aug '25

10 Aug '25

Hello, The use case is simple: we have to forbid sieve redirects to outside, but should be able to redirect inside. The patch below adds a new sieve configuration option sieve_allowed_redirects to list the domains to which redirects are permitted and otherwise are not allowed. Please consider it. diff --git a/pigeonhole/doc/example-config/conf.d/90-sieve.conf b/pigeonhole/doc/example-config/conf.d/90-sieve.conf index 238bcf4..3b4ac65 100644 --- a/pigeonhole/doc/example-config/conf.d/90-sieve.conf +++ b/pigeonhole/doc/example-config/conf.d/90-sieve.conf @@ -126,6 +126,10 @@ plugin { # script execution. If set to 0, no redirect actions are allowed. #sieve_max_redirects = 4 + # The comma/space separated list of email domains where redirection is allowed. + # If the list is empty, there is no restriction. + sieve_allowed_redirects = + # The maximum number of personal Sieve scripts a single user can have. If set # to 0, no limit on the number of scripts is enforced. # (Currently only relevant for ManageSieve) diff --git a/pigeonhole/src/lib-sieve/cmd-redirect.c b/pigeonhole/src/lib-sieve/cmd-redirect.c index 6a3b0a4..17e9031 100644 --- a/pigeonhole/src/lib-sieve/cmd-redirect.c +++ b/pigeonhole/src/lib-sieve/cmd-redirect.c @@ -107,6 +107,24 @@ const struct sieve_action_def act_redirect = { .commit = act_redirect_commit, }; +static bool +cmd_redirect_allowed(struct sieve_instance *svinst, + const struct smtp_address *to_address) +{ + const char **domain; + bool result = TRUE; + + if (!svinst->allowed_redirects) + return TRUE; + for (domain = svinst->allowed_redirects; *domain != NULL; ++domain) { + if (strcasecmp(*domain, to_address->domain) == 0) { + return TRUE; + } + result = FALSE; + } + return result; +} + /* * Validation */ @@ -127,6 +145,12 @@ cmd_redirect_validate(struct sieve_validator *validator, if (!sieve_validator_argument_activate(validator, cmd, arg, FALSE)) return FALSE; + if (svinst->max_redirects == 0) { + sieve_command_validate_error(validator, cmd, + "local policy prohibits the use of a redirect action"); + return FALSE; + } + /* We can only assess the validity of the outgoing address when it is * a string literal. For runtime-generated strings this needs to be * done at runtime. @@ -148,14 +172,17 @@ cmd_redirect_validate(struct sieve_validator *validator, } } T_END; + if (!result && + !cmd_redirect_allowed(svinst, + sieve_address_parse_str(raw_address, &error))) { + sieve_command_validate_error(validator, cmd, + "local policy prohibits the use of a redirect action"); + return FALSE; + } + return result; } - if (svinst->max_redirects == 0) { - sieve_command_validate_error(validator, cmd, - "local policy prohibits the use of a redirect action"); - return FALSE; - } return TRUE; } @@ -238,6 +265,11 @@ cmd_redirect_operation_execute(const struct sieve_runtime_env *renv, "local policy prohibits the use of a redirect action"); return SIEVE_EXEC_FAILURE; } + if (!cmd_redirect_allowed(svinst, to_address)) { + sieve_runtime_error(renv, NULL, + "local policy prohibits the use of a redirect action"); + return SIEVE_EXEC_FAILURE; + } if (sieve_runtime_trace_active(renv, SIEVE_TRLVL_ACTIONS)) { sieve_runtime_trace(renv, 0, "redirect action"); diff --git a/pigeonhole/src/lib-sieve/sieve-common.h b/pigeonhole/src/lib-sieve/sieve-common.h index e79fb4d..d980c9d 100644 --- a/pigeonhole/src/lib-sieve/sieve-common.h +++ b/pigeonhole/src/lib-sieve/sieve-common.h @@ -209,6 +209,7 @@ struct sieve_instance { const struct smtp_address *user_email, *user_email_implicit; struct sieve_address_source redirect_from; unsigned int redirect_duplicate_period; + const char **allowed_redirects; }; /* diff --git a/pigeonhole/src/lib-sieve/sieve-settings.c b/pigeonhole/src/lib-sieve/sieve-settings.c index 47f70da..70addc7 100644 --- a/pigeonhole/src/lib-sieve/sieve-settings.c +++ b/pigeonhole/src/lib-sieve/sieve-settings.c @@ -267,4 +267,10 @@ void sieve_settings_load(struct sieve_instance *svinst) svinst->user_email = address; } } + svinst->allowed_redirects = NULL; + str_setting = sieve_setting_get(svinst, "sieve_allowed_redirects"); + if (str_setting != NULL && *str_setting != '\0') { + svinst->allowed_redirects = + (const char **)p_strsplit_spaces(svinst->pool, str_setting, ", "); + } } Best regards, Jozsef -- E-mail : kadlecsik.jozsef(a)wigner.hun-ren.hu PGP key: https://wigner.hu/~kadlec/pgp_public_key.txt Address: Wigner Research Centre for Physics H-1525 Budapest 114, POB. 49, Hungary

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Quota wrongfully reported as exceeded on shared mailbox
by adminkram＠tripelspark.de 07 May '25

07 May '25

Hi, I've been scratching my head without luck with the following problem: I've shared a mailbox from one user "COMPANY" to another user "JOE". Both users have quotas and both quotas are less than 50% used. When the user JOE tries to post a message into the shared folder, dovecot complains that the user would be over quota: bash# /usr/lib/dovecot/imap -u JOE 1 append shared/COMPANY/Sent/JOE {10} a NO [OVERQUOTA] Quota exceeded (mailbox for user is full) (0.057 + 0.000 + 0.057 secs). However, nobody is over quota: bash# doveadm quota get -u COMPANY Quota name Type Value Limit % User quota STORAGE 4754996 10485760 45 User quota MESSAGE 33695 - 0 bash# doveadm quota get -u JOE Quota name Type Value Limit % User quota STORAGE 14 1048576 0 User quota MESSAGE 3 - 0 Some more infos: 1. Dovecot-2.3.21 (+Debian updates) 2.3.21 (47349e2482) (NOTE: dovecot.org/mailing-lists says: Use dovecot –version to get it. The command is dovecot --version, though!) 2. I've performed "doveadm quota recalc" on both users, no change. 3. I've checked sharing ACL permissions, if I give just "l" permission, the response will be "NO [NOPERM] Permission denied". It does not seem to be an ACL permission reported wrongly. 4. I've tried increasing the quota size beyond reason (100 Gbytes for JOE), no change. 5. I've restarted dovecot after each change. 6. When trying to move a message into the shared Sent/joe folder in Thunderbird, same problem happens, Thunderbird displays the over quota message. Thunderbird cannot display the quota info for the shared folder, though. 7. I tried to enable rawlog (rawlog_dir in protocol imap). It does nothing helpful. It logs the manual commands from my pre-auth sessions (imap -u JOE) but it will stubbornly not log any commands issued by Thunderbird. ?! Any idea how to further debug this or what could be wrong? Thank you, Wolfgang

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Problem email client iPhone ios18.2
by andrzej.milewski＠gmail.com 17 Apr '25

17 Apr '25

Hello, I have a fairly new installation of the Dovecot server version 2.3.19.1 on Debian 12.8. In general, the server works correctly. It sends and receives emails without issues. The clients primarily use Thunderbird on desktops and Gmail on Android. However, some clients are using iPhones with various hardware versions. Those with iOS below version 18 work correctly without any issues. Those who have updated their phones to version 18 and now even 18.2 are experiencing problems with mailbox synchronization. On version 18.2, the issue appears as follows: When you open the app, you can read several messages. They load correctly, but, for instance, attachments do not. If I wait for some time, the attachment eventually loads. During this time, I observe the server logs, and it shows that a certain session on the Dovecot server has ended. Dec 17 13:13:01 iredmail0 dovecot[408]: imap(xxx(a)xxx.com)<44785><1QGZCHcp/+3AqM2O>: Disconnected: Connection closed (UID SEARCH finished 92.295 secs ago) in=2972 out=6076956 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=36 body_bytes=6059064 Dec 18 08:40:41 iredmail0 dovecot[408]: imap(xxx(a)xxx.com)<177412>: Disconnected: Connection closed (UID FETCH finished 90.079 secs ago) in=5126 out=1304237 deleted=0 expunged=0 trashed=0 hdr_count=94 hdr_bytes=289688 body_count=89 body_bytes=969615 Dec 18 08:42:19 iredmail0 dovecot[408]: imap(xxx(a)xxx.com)<177410><D5mqU4cpZ+nAqM2O>: Disconnected: Connection closed (UID FETCH finished 95.051 secs ago) in=4475 out=1162785 deleted=0 expunged=0 trashed=0 hdr_count=95 hdr_bytes=281674 body_count=61 body_bytes=839545 Dec 18 08:44:17 iredmail0 dovecot[408]: imap(edyta.kowalewska(a)laktopol.com.pl)<177918>: Disconnected: Connection closed (UID FETCH finished 92.132 secs ago) in=29399 out=30266644 deleted=0 expunged=0 trashed=0 hdr_count=565 hdr_bytes=1726228 body_count=628 body_bytes=28109455 After the session is closed, the attachment loads immediately. From the logs and router analysis, it appears that the download happens in another previously opened session. After this incident, I go to another message with an attachment, and the situation repeats. There are also situations where the email body does not load, and the app waits for the server until the session closes and the content is fetched in another session. It does not matter whether I connect to the server via the internet or through a local network. On an iPhone 7 with iOS 15.8.3, everything works smoothly. Attachments open without issues. On iOS 18.1.1, attachments do not load, and the session does not close on its own. It takes forever unless the app is closed. In the Gmail app, everything works correctly without any issues. This is clearly a problem with the mail client on iPhone. However, is there anything I can adjust in my server settings to mitigate this issue for users? My dovecot configuration https://pastebin.com/UPNQ5dZz

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Stats-writer permission denied
by Ken Wright 15 Apr '25

15 Apr '25

I've got a new Dovecot error (well, new to me, at least)! I ran tail /var/log/mail.err and got the following: net_connect_unix(/var/run/dovecot/stats-writer) failed: Permission denied I checked the file, and it's owned by www-data and the www-data group, with read and write permissions for owner and group... just like I have specified in /etc/dovecot/conf.d/10-master.conf. I can't understand why permission is denied when the file permissions appear to be correct. Can anyone shed any light on this for me? Ubuntu 20.04 Dovecot 2.3.7.2 Ken

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Bug: Logout counters reset after recreating hibernated process
by Eirik Rye 12 Mar '25

12 Mar '25

Hello, # dovecot --version 2.3.20 (80a5ac675d) When using hibernation (`imap_hibernate_timeout = 10s`), counters such as deleted/expunged messages, appear to be reset after the user process is recreated. Steps to reproduce: 1. Configure IMAP hibernation 2. Login with IMAP client 3. Delete+expunge a message 4. IDLE, and wait 10s for process to be hibernated 5. Unhibernate process (`DONE`), and log out 6. Observe the logged line: 2023-09-05T17:36:26+0200 imap(<redacted>)<776933><jA2nYJ4EPdcqAVtAAADwAAutur4AAAAB>: Info: Disconnected: Logged out in=9 out=88 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0 The expected output is "deleted=1 expunged=1", not "deleted=0 expunged=0". If you follow the steps above, but skip the IDLE/hibernate step, the output is as expected. Interestingly, if the client is disconnected during hibernation (without recreating the process), the output from `imap-hibernate` is still as expected: 2023-09-05T17:45:15+0200 imap-hibernate(<redacted>)<770540><0qE0gJ4Emt8qAVtAAADwAAutur4AAAAB>: Info: Disconnected: Connection closed in=97 out=1020 deleted=1 expunged=1 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0 This leads me to believe the counters are lost during process recreation, not during hibernation. This is an issue as customers will often come to us asking why messages have disappeared in their inbox, or asking for help to identify which client is expunging messages. Right now, this information is lost if hibernation is used and the client is hibernated after expunging. Best regards, Eirik Rye

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find mailbox (path) of message
by Marc 13 Jan '25

13 Jan '25

How should I use 'doveadm search -u' to get the mailbox path where the message is stored?

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Hard-coded upper limit for sieve_max_redirects ?
by Maciej Polewczynski 02 Jan '25

02 Jan '25

Hello, After upgrading Dovecot from version 2.3.4 to 2.3.19 i noticed errors for some users having sieve redirects. Before upgrade all worked fine. In sieve plugin i have two limits: sieve_max_actions = 500 sieve_max_redirects = 150 If user have up to 100 redirects all works fine but if there are 101 or more none of them works and there is error: dovecot: lmtp(test2.mbox) Error: sieve: msgid=<***l>: redirect action: failed to check for duplicate forward to <101th.email.address> It seams that there is another limit but cant find where. When checked "dovecot -n|grep 100" there was only "default_process_limit". Increasing this changed nothing. Still the same error. File ".dovecot.sieve.log" in user home dir don't have any additional information. There is only: redirect action: failed to check for duplicate forward: internal error occurred: refer to server log for more information. Do you have any ideas how to fix it? -- Best regards, Maciej Polewczyński Do or do not. There is no try.

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Moving all mail from one user to another
by Peter Reinhold 29 Dec '24

29 Dec '24

Hi all I have a user that has changed domain, and I am looking to move all her mail from her old account into her new one, but I am really unsure about how to go about it I would think that I am should use https://doc.dovecot.org/main/core/man/doveadm-move.1.html to do it, but the example supplied and all discussion about that tool I can find online is only about moving a users mail across folders on their account, and not the entire accounts content to another account. Has anyone tried to do something like this? -- Peter Reinhold

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993 SSL 143 No encryption
by Dino Edwards 26 Dec '24

26 Dec '24

Hello, I have a dovecot server that listens on both 143 and 993 using SSL. I'm trying to get the 143 port to be unencrypted while 993 to remain encrypted. Is there any way to accomplish this? Thanks

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