March 2019 - dovecot - dovecot.org

Is this assumption correct?
by Tobi 23 Mar '19

23 Mar '19

Hello list we encounter a weird SSL issue with one of our dovecot (2.2.24 on Centos6) which we can only explain if our assumtion is correct :-) Symptoms are that imaps connections (on port 993) suddenly get veeeery slow. Up to 180s for one connection with openssl s_client The thing we do not understand is that in the same time imap connections with starttls are just 1s. We can see that entropy on the affected system is not so high cat /proc/sys/kernel/random/entropy_avail 138 So our current theory is: we're running short of entropy but imaps connections are much more affected because they are encrypted from first bit. Whereas a starttls connection has an unencrypted part which generates some entropy it does not use. So I can add entropy to the system that other connections can use. We're open for any other theory but for the moment we believe (tm) that this is the reason that starttls is far more less affected than SSL Cheers tobi

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Messages not saved to my "Sent" folder
by Esteban L 23 Mar '19

23 Mar '19

Hello, Using Dovecot 2.2.27 1. Had an issue where my Sent box, "disappeared." I used to be present, but then it was just gone. I went in and changed the /etc/dovecot/conf.d/15-mailboxes.conf the auto=subscribe feature had disappeared, even though I had added that line at setup. Below is the new changes. # For \Sent mailboxes there are two widely used names. We'll mark both of # them as \Sent. User typically deletes one of them if duplicates are created. mailbox Sent { special_use = \Sent auto = subscribe } mailbox "Sent Messages" { special_use = \Sent } } 2. But, mail is STILL not sent to SENT folder. 3. I have reload both postfix and dovecot, and also systemctl restart postfix && systemctl restart dovecot. The Sent folder is present, but no mail is stored to it. 4. Before sending this email, I checked my mobile client, and the Sent file was full from previously sent email. When I "updated it"/repolled it, it is now empty. Any able to lend a helping hand? Thanks.

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Maildirs on AWS EFS
by Rodolfo Gonzalez 22 Mar '19

22 Mar '19

Hello, AWS released one month ago a EFS system with administered life cycle, which means that files not accessed in the last 30 days are moved to a lower cost storage tier. Currently I hold my e-mail, delivered to Maildir++ folders by postfix and retrieved with Dovecot, in standard EBS volumes. This has the disadvantage that I need to allocate more than enough space to ensure that the volume won't get filled too soon. And this costs. Changing to standard EFS wasn't an option, since it's way more expensive than EBS. But, with the new system, costs are lower. I just have a doubt in the technical side: is it safe to have the email in EFS? I've read experiences about storing in S3 and using a driver to mount the bucket, and it seems that it's not a very good option. But EFS works like NFS4. Does anyone have experience mounting an EFS to store maildirs? Thanks in advanced, Rodolfo.

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Can't remove a folder created with doveadm import from IMAP client
by Francis 22 Mar '19

22 Mar '19

Hi, I imported mails with the doveadm import command. It worked great, but now, I'm unable to remove the folder backup-2019-03-22? In Thunderbird, the folder is displayed with grey italic font. The command I ran: doveadm import -u user(a)example.com mdbox:/var/vmail/domains/ example.com/user/mdbox-backup INBOX/backup-2019-03-22 all I found this help page from Mozilla: http://kb.mozillazine.org/Grey_italic_folders. It says Thunderbird display the folder in grey italic when the folder have the \Noselect flag. Is it the case with the problem I'm having? If yes, how to remove that flag on the folder? Thanks. -- Francis

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dovecot.sieve shows up as a mailbox
by Esteban L 22 Mar '19

22 Mar '19

Hello, Config infos below. Short version, I am getting this weird anomaly on my main email account. Such that, "dovecot.sieve" is showing up as a mailbox in my various email clients (e.g. k-9 (mobile), and Evolution). I have tried deleting the "rogue folder" with doveadm, but it just returns. Anyone have any suggestions where I can track this down. dovecot --version 2.2.27 dovecot -n # 2.2.27 (c0f36b0): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.16 (fed8554) # OS: Linux 4.9.0-6-amd64 x86_64 Debian 9.8 ext4 auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_verbose = yes auth_verbose_passwords = yes mail_debug = yes mail_location = maildir:/var/mail/vmail/%d/%n mail_plugins = " quota" mail_privileged_group = 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 namespace inbox { inbox = yes location = mailbox Archive { auto = subscribe special_use = \Archive } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { quota = maildir:User quota quota_grace = 10%% quota_rule = *:storage=10G quota_rule2 = Trash:storage=+1G quota_status_overquota = 552 5.2.2 Mailbox is full quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_after = /etc/dovecot/sieve/spamfilter.sieve sieve_dir = ~/sieve } protocols = " imap lmtp sieve" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } } service imap-login { inet_listener imaps { port = 993 ssl = yes } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl = required ssl_cert = </etc/letsencrypt/live/little-beak.com/fullchain.pem ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_ssl = yes protocol lmtp { mail_plugins = " quota sieve" postmaster_address = esteban(a)little-beak.com } protocol lda { mail_plugins = " quota sieve" } protocol imap { mail_plugins = " quota imap_quota" }

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Re: imap ---- LIST "" * The returned mailbox does not display quotes
by lty 21 Mar '19

21 Mar '19

Yes, Foxmail for mac client, after dovecot upgrade from 2.1.17 to new version, imap can't receive any email, I perform packet capture test, foxmail will not have next step after sending {LIST "" *} command action. Foxmail for mac client, dovecot version 2.1.17 can receive imap mail normally, because we need to add quota_max_mail_size configuration, we must upgrade to a higher version (https://wiki2.dovecot.org/Quota/Configuration# Maximum_saved_mail_size) After comparison, the new version of dovecot returned without quotes. I hope that the quotes can be changed in the configuration, can I? Can I change the configuration to add quotes now? Or add this setting in the next version. > On 21 Mar 2019, at 6.22, lty via dovecot <dovecot(a)dovecot.org> wrote: > >> dovecot version >> >> v2.2.29 >> >> v2.2.36 >> >> v2.3.5 >> >> LIST "" * The returned mailbox does not display quotes >> v2.1.17 >> >> LIST "" * The returned mailbox shows quotation marks >> >> Why is the quotation mark removed in the new version? > > Because they were unnecessary. The code was changed to use more generic IMAP token writer, which adds quotes only as necessary. > >> Is there any configuration option in the new version to add quotes? > > No. Does it break some client?

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Re: Dovecot quota and Postfix smtpd_recipient_restrictions?
by Davide Marchi 21 Mar '19

21 Mar '19

> From: Urban Loesch <bind(a)enas.net> > Hi, > >> Well, >> >> so the right syntax (in my case) would be: >> >> -o smtpd_recipient_restrictions = >> reject_non_fqdn_recipient,reject_unknown_recipient_domain,permit_sasl_authenticated,reject,check_policy_service >> inet:mailstore.example.com:12340 >> >> right?? > I configured it before the "permit_sasl_authenticated" and the "reject" > statement. > >> >> And eventually, should you suggest me how made some functional >> verification test? > According to: http://www.postfix.org/SMTPD_POLICY_README.html try on > your postfix: > > telnet mailstore.example.com 12340 > > and insert the following lines: > > sender=somesender(a)somedomain.com > recipient=your(a)recipient.com > size=12345 > [empty line] > > > Set a size= in bytes which is greater that your configured quota. > In theory the policy service should respond with your configured error > message "552 5.2.2 Mailbox is full". > > Example on my server: > > ... > sender=postmaster(a)somedomain.com > recipient=my(a)recipient.com > size=123450000000 > > action=552 5.2.2 Mailbox is full > ... > > > For a livetest reduce the quota of your testaccount to ex. 100KB and > the send a mail > 100BK from outside to it. You should see the "552" > error > message in your logs and you should get back a bouncemail from the > sending server. > > Hope I explained it correct. > > Best > Urban WAW! Very very clear your example! Thanks again Urban, you are a friend ;-) I will try... Thanks again to all! Davide -- cosmogoniA n o p r o v a r e n o f a r e o n o n f a r e n o n c e p r o v a r e

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imap ---- LIST "" * The returned mailbox does not display quotes
by lty 21 Mar '19

21 Mar '19

dovecot version v2.2.29 v2.2.36 v2.3.5 LIST "" * The returned mailbox does not display quotes dovecot version v2.1.17 LIST "" * The returned mailbox shows quotation marks Why is the quotation mark removed in the new version? Is there any configuration option in the new version to add quotes? Because I see a lot of big public mailboxes with quotation marks.

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Dovecot crashing when attempting to search in virtual folder with fts_squat activated
by benjamin＠godbersen.info 20 Mar '19

20 Mar '19

Hi everyone, I am running into a problem when trying to use fts_squat in a virtual folder. Without fts_squat plugin the search (from, subject...) works in all folders. With activated fts the search on the inbox folders works expectedly well but any attempt to search anything in any virtual folder leads to the following error. Similarly when attempting "doveadm fts lookup". I also noticed that no search index for the virtual folders gets build - is this expected behaviour? Mar 14 23:14:58 *** dovecot: service=imap, user=***, ip=[::1]. Panic: file mail-storage.c: line 1913 (mailbox_get_open_status): assertion failed: (box->opened) Mar 14 23:14:58 *** dovecot: service=imap, user=***, ip=[::1]. Error: Raw backtrace: /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(+0xba731) [0x7f553a7ff731] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(+0xba7fa) [0x7f553a7ff7fa] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(i_fatal+0) [0x7f553a771638] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot-storage.so.0(mailbox_get_open_status+0x68) [0x7f553aae4a78] -> /usr/lib/dovecot/modules/lib21_fts_squat_plugin.so(+0x3684) [0x7f553677a684] -> /usr/lib/dovecot/modules/lib21_fts_squat_plugin.so(+0x3820) [0x7f553677a820] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(fts_backend_lookup_multi+0x163) [0x7f5539b016a3] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(+0xd728) [0x7f5539b06728] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(fts_search_lookup+0xeb) [0x7f5539b06bbb] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(+0xf8b8) [0x7f5539b088b8] -> dovecot/imap(imap_search_start+0x6a) [0x5654cb5a0d6a] -> dovecot/imap(cmd_sort+0x293) [0x5654cb593553] -> dovecot/imap(command_exec+0x64) [0x5654cb599874] -> dovecot/imap(+0x1bd22) [0x5654cb597d22] -> dovecot/imap(+0x1bdbc) [0x5654cb597dbc] -> dovecot/imap(client_handle_input+0x1b5) [0x5654cb5981c5] -> dovecot/imap(client_input+0xa4) [0x5654cb5987e4] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(io_loop_call_io+0x69) [0x7f553a8174a9] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x12e) [0x7f553a818d1e] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7f553a8175ac] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f553a8177b8] -> /usr/lib/x86_64-linux-gnu/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f553a7940a3] -> dovecot/imap(main+0x339) [0x5654cb58a539] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f553a375b97] -> dovecot/imap(_start+0x2a) [0x5654cb58a71a] Mar 14 23:14:58 *** dovecot: service=imap, user=***, ip=[::1]. Fatal: master: service(imap): child 6436 killed with signal 6 (core dumps disabled) This is my config: # 2.3.0.1 (ffd8a29): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.0.1 (d33dca20) # OS: Linux 4.15.0-46-generic x86_64 Ubuntu 18.04.2 LTS ext4 auth_mechanisms = plain login digest-md5 cram-md5 apop auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890&.-_@' default_vsz_limit = 8096 M disable_plaintext_auth = no first_valid_uid = 30 imap_client_workarounds = delay-newmail imap_logout_format = rcvd=%i, sent=%o mail_home = /var/qmail/mailnames/%Ld/%Ln mail_location = maildir:/var/qmail/mailnames/%Ld/%Ln/Maildir mail_log_prefix = "service=%s, user=%u, ip=[%r]. " mail_max_userip_connections = 100 mail_plugins = quota fts fts_squat virtual managesieve_logout_format = rcvd=%i, sent=%o managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeri$ namespace inbox { inbox = yes location = prefix = INBOX. separator = . } namespace virtual { hidden = no inbox = no list = yes location = virtual:/var/qmail/mailnames/%Ld/%Ln/virtual/:INDEX=/var/qmail/mailnames/%Ld/%Ln/virtual/ prefix = separator = . } passdb { driver = plesk } plugin { fts = squat fts_squat = partial=4 full=10 quota = maildir:User quota quota_grace = 0 sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +notify +imapflags } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_logout_format = rcvd=%i, sent=%o, top=%t/%p, retr=%r/%b, del=%d/%m, size=%s protocols = imap pop3 sieve service auth-worker { group = user = } service auth { group = unix_listener auth-userdb { group = popuser mode = 0600 user = popuser } user = } service imap-login { process_limit = 2048 service_count = 1 } service imap { process_limit = 2048 service_count = 1 } service pop3-login { process_limit = 2048 service_count = 1 } service pop3 { process_limit = 2048 service_count = 1 } ssl_cert = </etc/dovecot/private/dovecot.pem ssl_cipher_list = HIGH:!aNULL:!MD5 ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = uid=popuser gid=popuser driver = static } protocol imap { mail_plugins = quota fts fts_squat virtual imap_quota } protocol pop3 { pop3_uidl_format = UID%u-%v } protocol sieve { mail_plugins = quota fts fts_squat virtual } protocol lda { mail_plugins = quota fts fts_squat virtual sieve } dovecot --version -> 2.3.0.1 (ffd8a29) I will be greatful for any tips hinting me on how to resolve this behaviour. Thank you very much in advance Benjamin

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Dovecot Wiki: Please disable edit on double click
by Michael Goth 20 Mar '19

20 Mar '19

Hi Aki, could you maybe disable the 'edit on doubleclick' feature on wiki2.dovecot.org? Everytime I try to select a word by double clicking on it, I end up in editing mode. It's just a minor thing, but maybe I'm not the only one who's annoyed by this ;) Thanks! Michael

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