October 2023 - dovecot

Extract body preview in lua notify script
by Filip Hanes 20 Oct '23

20 Oct '23

Hi, I am trying to extract short text preview from mail body in function dovecot_lua_notify_end_txn. I want to send notification about new email with perex included. How can it be done? Is it possible? thanks -- Filip Hanes

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Replicator service in Dovecot 2.4 CE
by k v 18 Oct '23

18 Oct '23

On the documentation page for the upgrade to version 2.4 at https://doc.dovecot.org/3.0/installation_guide/upgrading/from-2.3-to-3.0/, it is mentioned that instead of the 'replicator' service (https://doc.dovecot.org/configuration_manual/replication/#replication-with-…) it is necessary to use an NFS cluster file system. Are you completely removing support for 'replication-with-dsync' starting from version 2.4? Are there any plans for built-in tools to implement an active/active or active/passive cluster in the community edition?

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Debian package for bookworm
by Claudio Corvino 14 Oct '23

14 Oct '23

Hi guys, I updated to Debian 12 but I can't find repo for bookworm on https://repo.dovecot.org/. When it will be released? Thanks! -- Claudio

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Quota wrongfully reported as exceeded on shared mailbox
by adminkram＠tripelspark.de 13 Oct '23

13 Oct '23

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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Dovecot behind Reverse Proxy and IP families
by Arnaud Cordier 12 Oct '23

12 Oct '23

Dear all, I am running Dovecot 2.3.20 in a Kubernetes cluster. The Dovecot container is exposed behind a Traefik load-balancer, which acts just like HAProxy would, using the Proxy Protocol in order to allow Dovecot to be aware of the real source IP of the client, as follows: Internet <-> Traefik load-balancer <---- Proxy protocol ----> Dovecot My setup works well over IPv4. Oct 12 19:11:33 imap-login: Info: Login: user=<arnaud@xxx>, method=PLAIN, rip=<my_ipv4_public_address> lip=10.42.4.21, mpid=1369531, session=<xxxx> Howevever, if the client originates from an IPv6 address, Dovecot does not seem to take the real IPv6 origin into account and fails. Oct 12 19:09:04 imap-login: Error: haproxy(v1): Client disconnected: Proxied local address is invalid (address=`10.42.4.21', rip=10.42.4.21) A network capture shows that the proxy protocol indeed sends the real IPv6 IP, that should be taken into account by dovecot: ......&.PROXY TCP6 2001:<rest_of_my_public_ip> 10.42.4.21 20200 993 The error seems to be raised in "core/src/lib-master/master-service-haproxy.c" line 553: 551 if (net_addr2ip(*fields, &local_ip) < 0 || 552 local_ip.family != family) { 553 e_error(hpconn->event, "Client disconnected: " 554 "Proxied local address is invalid " 555 "(address=`%s', rip=%s)", str_sanitize(*fields, 64), 556 net_ip2addr(real_remote_ip)); 557 return -1; 558 } 559 fields++; I suppose that the issue is related to the fact that the client originates from an IPv6 then the reverse proxy forwards the connection to Dovecot over IPv4, which results in the "local_ip.family != family" condition to be true. Why is such a restriction implemented ? It is to be noted that I implemented the exact same load-balancer architecture for postfix, which successfully handles an IPv6 real IP over an IPv4 connection. I temporarily fixed the issue by setting an IPv4 only DNS record for my imaps domain name, however, do you think that a fix could be implemented in Dovecot? Kind regards, -- --- Arnaud Cordier --------------- CryptID Freelance cybersecurity engineer - Pentester - Red teamer Tel: +33 (0)6 61 44 82 04

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Create autoreply with http api
by cyril.leclerc＠mantiq.com 12 Oct '23

12 Oct '23

Hi, Is it possible to activate autoreply from http api : https://doc.dovecot.org/admin_manual/doveadm_http_api/ on mailbox ? because on evolution client we could not activate out of office, autoreply, with http api and sieve commands, is it possible to achieve it fron our web application ? thank you

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doveadm(user): Error purging namespace
by Taavi Ansper 10 Oct '23

10 Oct '23

Hi I have an issue with doveadm: doveadm(user): Warning: mdbox /home/user/mdbox/storage: Inconsistency in map index (227,40 != 227,56) doveadm(user): Warning: fscking index file /home/user/mdbox/storage/dovecot.map.index doveadm(user): Warning: mdbox /home/user/mdbox/storage: rebuilding indexes doveadm(user): Error: Purging namespace '' failed: BUG: Unknown internal error Why does this happen and how can it be resolved? User is using thunderbird as the mail client. -- Taavi Ansper taavi.ansper(a)cyber.ee

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spool move/rename question
by Dave McGuire 09 Oct '23

09 Oct '23

Hi folks. Our mail server's spools are structured like this: /var/mail/<domain>/<user> We have an existing user with a lot of mail that we need to move from one domain to another. Our mail system is database-backed so changing the account is trivial, but can I just move the <user> directory from the structure above from one <domain> directory to another and expect everything to be ok? Or is there a better approach? (of course I'll do a backup first) Thanks, -Dave -- Dave McGuire, AK4HZ New Kensington, PA

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qp and Invalid quoted-printable input trailer: '=' not followed by two hex digits
by Arkadiusz Miśkiewicz 09 Oct '23

09 Oct '23

I have a mail (attached) for which dovecot reports: imap(test): pid=<32688> session=<UOVJ/0UHlM3B7y+g>, Error: Mailbox INBOX.test: UID=1: read(<binary stream of mailbox INBOX.test UID 1>) failed: read(/var/mail/test/.test/cur/1695887652.M710714P17846.mbox13:2,RS) failed: Invalid quoted-printable input trailer: '=' not followed by two hex digits and I fail to see why. There is = used at the end of lines as soft-line break. Also if you delete "przez system Spa=" it works. If you lave it and delete "<br>=" line it also works. Doesn't seem to be consistent. Is dovecot too restrictive here? dovecot 2.3.20 and 2.3.21 -- Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org )

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bug report: lmtp fails on root-squashed NFS filesystem
by Anne Bennett 09 Oct '23

09 Oct '23

Hi, all. I'm trying to set up Postfix with dovecot LTMP delivery on a host where the user files (/var/spool/mail as well as home directories) are on NFS filesystems, which are exported root-squashed to the mail server. I definitely don't want to give the mail server root permissions on the user files. LMTP delivery fails with this logged message (e.g.): Nov 16 17:51:36 lust dovecot: lmtp(anne)<16830><mkkzEPg1lGG+QQAAs/mAJw>: msgid=<202111162229.1AGMTfAO024765(a)vindemiatrix.encs.concordia.ca>: save failed to INBOX: Read-only mbox I found this posting where someone else had a similar problem and traced it in some detail back in 2019: https://dovecot.org/list/dovecot/2019-February/114611.html but apparently no one answered the fellow. In order to check that this is indeed the same problem, I temporarily changed the INBOX definition to make it write into /var/tmp/ (on a local filesystem), and delivery worked. I then temporarily changed the INBOX definition to make it write into an NFS filesystem with root NOT squashed, and again it worked (after I chmodded the directory to 1777 to allow any user to create a file). I believe that the person who wrote the above posting is correct: at some point, file access is (incorrectly) checked as root instead of as the target user. This is a bit of a showstopper for me. Any plans to address this? I attach the output of "dovecot -n", fwiw, but I don't think that this is a configuration problem... Anne. -- Ms. Anne Bennett, Senior Sysadmin, ENCS, Concordia University, Montreal H3G 1M8 anne(a)encs.concordia.ca +1 514 848-2424 x2285

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