July 2018 - dovecot - dovecot.org

Stopping login via "nologin" parameter
by J Doe 23 Jul '18

23 Jul '18

Hello, I have a basic e-mail server with Postfix 3.1 and Dovecot 2.2.22. I am using a passwd-file for both userdb and passdb: /etc/dovecot/dovecot.conf userdb { driver = passwd-file args = /etc/dovecot/passwd } passdb { driver = passwd-file args = /etc/dovecot/passwd } } In the passwd file, I want to have user account names for SMTP SASL AUTH and IMAP that are NOT e-mail addresses. For example, employee one of ABC corp would have a SMTP SASL AUTH/IMAP account name in the form: abc_company_employeeid (for example: abc_company_03284). The idea behind that is that I do not want someone outside of the company to be able to know the first half of the username and password pair just because they have an employee's e-mail address. For the e-mail address I specify something like: bob(a)abc.com however I never want someone to be able to login via their e-mail address. Originally, I specified the password field as empty, with the understanding being that the default encryption of a password is {CRYPT}. Since crypt() cannot output a null string, this meant that there was never a valid password. So passwd looked like this: /etc/dovecot/passwd # SMTP SASL AUTH and IMAP accounts abc_company_03284:::::::userdb_mail=maildir:/var/mail/vhosts/abc.com/abc_co… # IMAP bob@abc.com:vmail:vmail::/home/vmail/bob::userdb_maill=maildir:/var/mail/vhosts/abc.com/abc_company_03284 I tested SMTP SASL AUTH and IMAP via the openssl s_client and can confirm that I can login and send e-mail as well as retrieve mail only via the: abc_company_03284 account, but because an empty password field isn’t mentioned on the Dovecot wiki, I was wondering if I should add “nologin” to explicitly make it impossible for: bob(a)abc.com. “nologin” was mentioned to me in a previous e-mail to this list. So passwd would now look like this: /etc/dovecot/passwd # SMTP SASL AUTH and IMAP accounts abc_company_03284:::::::userdb_mail=maildir:/var/mail/vhosts/abc.com/abc_co… # IMAP bob@abc.com:vmail:vmail::/home/vmail/bob::userdb_mail=maildir:/var/mail/vhosts/abc.com/abc_company_03284 nologin I restarted Dovecot and tested this with openssl s_client for SMTP SASL AUTH and IMAP, but just wanted to make sure that this STOPS ANY LOGINS via the e-mail address: bob(a)abc.com ? Thanks, - J

1 1

ot: LE server conf setup/ iPhone 'expired cert' message
by Voytek Eymont 22 Jul '18

22 Jul '18

I've installed LE certs on my Dovecot a while back, and, it has been working OK since, but, today, an iPhone user said he can't get emails as iphone says 'cert is expired', searching around, I see some other iPhone similar issues reported, do I have my conf correct, I have; # cat dovecot.conf | grep ssl ssl = required verbose_ssl = no ssl_cert = </etc/letsencrypt/live/fqn.myserver/fullchain.pem ssl_key = </etc/letsencrypt/live/fqn.myserver/privkey.pem is fullchain.pem and privkey.pem is what I should be using ? anythought how to force an iphone to reload cert ? actual cert was renewed 15/7, old/previous one expired earlier today ls /etc/letsencrypt/live/fqn.myserver/ cert.pem chain.pem fullchain.pem privkey.pem (if I open mailserver host in browser, padlock shows current/valid cert) -- Voytek

6 8

Dbox lost messages
by Fineware PM 20 Jul '18

20 Jul '18

Hello, I use dovecot with dbox storage system. Today I receive 2 mail (I see that in the maillog ) but I don't find in INBOX using my IMAP client. I look in the files m.* and I find the message that I receive. But I cannot find it in any IMAP folder. I try to run "doveadm force-resync -u user inbox" but nothing change. I export all email using the command "doveadm backup -u user mbox:/tmp/mail:INDEX:/tmp/imap:LAYOUT:maildir++ and in the mbox file for inbox I found the 2 mails arrived. How I can understand why I cannot see the messages ? or how I can recover it ? Bet regards.

2 5

OT: 'lost' emails
by Voytek 20 Jul '18

20 Jul '18

I suspect this is mail client issue, but looking for any suggestions: user with Thunderbird says " I'm losing emails, mail is not in inbox, but, when I search, that email shows in search result, but, I can't open the email body" i don't fully understand what he was trying to say, and, won't be able to look at his PC till Monday. Looking at inbox's 'cur' directory, I can see the'missing' email amongst the other 2000 emails in 'cur' Is there any indexing I should do on the user's email folder, how? or, is this purely Thunderbird issue, and, I need to re index Thunderbird? V -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

3 2

SIS: dovecot creates duplicated attachments (sometimes)
by Alexander Moisseev 20 Jul '18

20 Jul '18

SIS deduplication was broken in 2.2.16 and has been fixed with https://github.com/dovecot/core/commit/3b39022ea0513363241cf852b7d454c84158… but still sometimes (just several times in a month or so) dovecot creates duplicated attachments. As you can see in directory listings below all attachments was created at (about) the same time, but one of them has different inode number. It easy to discover using https://github.com/moisseev/doveadm-tools/blob/master/bin/dsisck # dsisck -n mail_uid=vmail mail_attachment_dir=/vmail/attachments ==> Checking SIS... # ln -f ./30/b3/30b367c584a123eee59478adf3e4f4c9e1226545-c56eae04a67c3157287f01003d96bafd ./30/b3/30b367c584a123eee59478adf3e4f4c9e1226545-7ad0a411d17c31572b7a01003d96bafd # mkdir -p -m 700 ./64/8f/hashes && ln ./64/8f/648f5cfa27af6d20c8570fdcaeab997663e15105-55430d2cd4432c571cb600003d96bafd ./64/8f/hashes/648f5cfa27af6d20c8570fdcaeab997663e15105 # ln -f ./6f/3f/6f3fa3e4d374a9c80d07af54960ce0e7adb2e0fe-b1935817ed753557546700003d96bafd ./6f/3f/6f3fa3e4d374a9c80d07af54960ce0e7adb2e0fe-72da1f32e38e3557947b00003d96bafd # ln -f ./dd/d9/ddd97aa6f624d4f54968d2c4956fc3a9d796b31b-6bf7c122fefb3157ad3500003d96bafd ./dd/d9/ddd97aa6f624d4f54968d2c4956fc3a9d796b31b-90fd1415e7e53157112800003d96bafd -------------------------------------------------------------- Unexpected objects found: 0 Attachments processed: 43500 Different attachments with similar hashes skipped: 0 Attachments deduplicated: 3 File system blocks freed up: 1800 Attachment deduplication attempts failed: 0 Hash files created: 1 Hash files creation attempts failed: 0 Hash files re-linked: 0 Hash files re-link attempts failed: 0 Orphaned hash files: 0 Invalid hash files (not a regular file): 0 -------------------------------------------------------------- # cd /vmail/attachments # ls -li ./30/b3/ ./30/b3/hashes/ ./30/b3/: total 1996 7464083 -rw------- 1 vmail vmail 337719 May 10 09:16 30b367c584a123eee59478adf3e4f4c9e1226545-7ad0a411d17c31572b7a01003d96bafd 7464082 -rw------- 6 vmail vmail 337719 May 10 09:16 30b367c584a123eee59478adf3e4f4c9e1226545-bb6eae04a67c3157287f01003d96bafd 7464082 -rw------- 6 vmail vmail 337719 May 10 09:16 30b367c584a123eee59478adf3e4f4c9e1226545-bd6eae04a67c3157287f01003d96bafd 7464082 -rw------- 6 vmail vmail 337719 May 10 09:16 30b367c584a123eee59478adf3e4f4c9e1226545-bf6eae04a67c3157287f01003d96bafd 7464082 -rw------- 6 vmail vmail 337719 May 10 09:16 30b367c584a123eee59478adf3e4f4c9e1226545-c36eae04a67c3157287f01003d96bafd 7464082 -rw------- 6 vmail vmail 337719 May 10 09:16 30b367c584a123eee59478adf3e4f4c9e1226545-c56eae04a67c3157287f01003d96bafd 7464084 drwx------ 2 vmail vmail 512 May 10 09:16 hashes ./30/b3/hashes/: total 332 7464082 -rw------- 6 vmail vmail 337719 May 10 09:16 30b367c584a123eee59478adf3e4f4c9e1226545 # ls -li ./6f/3f/ ./6f/3f/hashes/ ./6f/3f/: total 644 15088414 -rw------- 1 vmail vmail 326656 May 13 11:23 6f3fa3e4d374a9c80d07af54960ce0e7adb2e0fe-72da1f32e38e3557947b00003d96bafd 15088422 -rw------- 2 vmail vmail 326656 May 13 11:23 6f3fa3e4d374a9c80d07af54960ce0e7adb2e0fe-b1935817ed753557546700003d96bafd 15088448 drwx------ 2 vmail vmail 512 May 13 11:23 hashes ./6f/3f/hashes/: total 320 15088422 -rw------- 2 vmail vmail 326656 May 13 11:23 6f3fa3e4d374a9c80d07af54960ce0e7adb2e0fe # ls -li ./dd/d9/ ./dd/d9/hashes/ ./dd/d9/: total 748 80548 -rw------- 3 vmail vmail 250640 May 10 18:19 ddd97aa6f624d4f54968d2c4956fc3a9d796b31b-68f7c122fefb3157ad3500003d96bafd 80548 -rw------- 3 vmail vmail 250640 May 10 18:19 ddd97aa6f624d4f54968d2c4956fc3a9d796b31b-6bf7c122fefb3157ad3500003d96bafd 80547 -rw------- 1 vmail vmail 250640 May 10 18:19 ddd97aa6f624d4f54968d2c4956fc3a9d796b31b-90fd1415e7e53157112800003d96bafd 80549 drwx------ 2 vmail vmail 512 May 10 18:19 hashes ./dd/d9/hashes/: total 248 80548 -rw------- 3 vmail vmail 250640 May 10 18:19 ddd97aa6f624d4f54968d2c4956fc3a9d796b31b # doveconf -n # 2.2.24 (a82c823): /usr/local/etc/dovecot/dovecot.conf # Pigeonhole version 0.4.14 (099a97c) # OS: FreeBSD 10.3-RELEASE i386 auth_default_realm = example.com auth_mechanisms = digest-md5 cram-md5 plain apop doveadm_password = # hidden, use -P to show it first_valid_gid = 1000 first_valid_uid = 1000 lda_mailbox_autosubscribe = yes listen = * mail_attachment_dir = /vmail/attachments mail_gid = vmail mail_home = /vmail/%d/%n mail_location = mdbox:~/mdbox mail_plugins = quota zlib acl mail_shared_explicit_inbox = yes 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 namespace { list = children location = mdbox:%%h/mdbox:INDEXPVT=~/mdbox/shared/%%u prefix = shared/%%u/ separator = / subscriptions = no type = shared } namespace inbox { inbox = yes location = mailbox Archives { special_use = \Archive } mailbox Drafts { special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = separator = / } passdb { args = scheme=plain username_format=%n /usr/local/etc/dovecot/dovecot.auth/%d.passwd driver = passwd-file } plugin { acl = vfile acl_shared_dict = file:/vmail/shared-mailboxes.db antispam_backend = mailtrain antispam_mail_notspam = report_ham antispam_mail_sendmail = /usr/local/libexec/dovecot/dovecot-lda antispam_mail_sendmail_args = -d;spam(a)example.com;-m antispam_mail_spam = report_spam antispam_spam = Junk antispam_trash = Trash;train_ham;train_prob;train_spam quota = dict:User quota::file:%h/dovecot-quota quota_rule = *:storage=2G quota_rule2 = Trash:storage=+10%% quota_rule3 = Spam:storage=+20%% quota_status_nouser = DUNNO quota_status_success = DUNNO sieve_after = /usr/local/etc/dovecot/sieve/sieve.after sieve_before = /usr/local/etc/dovecot/sieve/sieve.before sieve_vacation_min_period = 0 zlib_save = gz zlib_save_level = 3 } postmaster_address = postmaster(a)example.com protocols = imap lmtp sieve pop3 quota_full_tempfail = yes service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { user = vmail } } service config { unix_listener config { mode = 0600 user = vmail } } service imap-login { inet_listener imaps { port = 0 } process_limit = 200 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } user = vmail } service pop3-login { inet_listener pop3s { port = 0 } } service quota-status { client_limit = 1 executable = quota-status -p postfix unix_listener /var/spool/postfix/private/quota-status { user = postfix } } ssl_cert = </etc/ssl/certs/mx.example.com.crt ssl_key = </etc/ssl/private/mx.example.com.key userdb { args = username_format=%n /usr/local/etc/dovecot/dovecot.auth/%d.passwd driver = passwd-file } verbose_proctitle = yes protocol imap { mail_plugins = quota zlib acl antispam imap_quota imap_zlib imap_acl } protocol lmtp { mail_plugins = quota zlib acl sieve }

1 1

folders not visible on copied mail folders
by Mark Foley 20 Jul '18

20 Jul '18

We had a user quit recently. Three days ago I copied his entire Maildir folder to another user to that user's Maildir/.JoesEmail. I changed ownership and made the permission 'chmod -R og-rwx .', just like all the other files/directories of the new owner. This didn't work to show the new folder. Today, in his Thunderbird client, I subscribed to the 'JoesEmail' folder. I restarted dovecot and restarted Thunderbird. In Thunderbird, the 'JoesEmail' folder now shows, but it is empty and shows none of the subordinate mail folders. I ran 'doveadm index -u newowner JoesEmail' and 'doveadm force-resync -u newowner JoesEmail'. This didn't help. I did this once before with a previous user who quit and only changed ownership, no subscribing, no doveadm, and that worked. What am I doing wrong? THX --Mark

4 9

100% Dovecot MTA Replacement Setup
by David Favor 19 Jul '18

19 Jul '18

Working out upgrade of old 1.x + 2.x Dovecot installs to latest 2.3.2.1 out of Ubuntu Bionic repositories. _______ https://wiki.dovecot.org/Services suggests Dovecot can be used for full mail infrastructure, avoiding the complexity of exim4 or other MTA setup/management. Let me know if I understand this correctly. 1) https://wiki.dovecot.org/Submission can be used to listen on port 25 + port 587 (with auth). 2) https://wiki.dovecot.org/Pigeonhole can be used for filtering, including forwarding email to other machines. 3) https://wiki.dovecot.org/Pigeonhole/ManageSieve/Configuration can be used to forward off machine email, for example flowing through a relay service like MailGun, using a simple script or service like ESMTPD. 4) https://wiki.dovecot.org/LMTP can be used to deposit messages into filesystem as Maildir or dbox or mdbox backing stores.

2 1

Replication problems
by Thomas Kristensen 19 Jul '18

19 Jul '18

Hey I am trying to setup a dovecot cluster with 2 servers using replication /dsync. In front of it I got a Fortinet ADC (Load balance) and I think that I messing up the dsync. I see mails duplicated in the sync progress. If I disable one of the servers in the ADC, it seems to work and the sync if working without a problem. But if I use both servers with a round robin on the ADC, I see mailed duplicated. Ex. I sent 100 mails thru the SMTP (Postfix) and 107 mails is in both servers, but as said before, if I disable one of the servers in the ADC, I see the correct amount of mails in both dovecot servers. In the header of the duplicated mails I see the exact same postfix id and LMTP id from dovecot. Also I cant seem to get any log from the sync progress. Med venlig hilsen Thomas Kristensen [MM_mail_logo_3_AS] Storhaven 12 - 7100 Vejle Tlf: 75 72 54 99 - Fax: 75 72 65 33 E-mail: tk(a)multimed.dk<mailto:tk@multimed.dk>

2 1

Re: Sendmail Dovecot Trouble
by John Rowan 19 Jul '18

19 Jul '18

/var/mail is a symlink to /var/spool/mail I tried both, neither works. I just wiped out the server, reinstalled from scratch this time I selected e-mail server while selecting packages after specifying GUI-server on the CentOS install. I had previously installed Dovecot after the initial server build. This time Dovecot was installed and active at boot but still can't find my mail in /var/spool/mail. On 7/13/2018 11:44 AM, Aki Tuomi wrote: > Should your INBOX path be /var/spool/mail/%u then? > > > > --- > Aki Tuomi > Dovecot oy > > -------- Original message -------- > From: John Rowan <rowan(a)rownetco.com> > Date: 13/07/2018 17:44 (GMT+02:00) > To: dovecot(a)dovecot.org > Subject: Sendmail Dovecot Trouble > > I've been struggling trying to get Thunderbird to read e-mail off a > CentOS 7 server. > > Sendmail writes mail in /var/spool/mail > > I've configured dovecot to try to read from there using Thunderbird > (POP3/SMTP). > > The firewall allows ports 25/110. > > I verified I have mail in /var/spool/mail > > but Thunderbird is unable to retrieve that mail. > > I've googled sendmail / dovecot config, I've looked a the wiki but I > just can't figure this out. > > Please don't suggest using postfix, I just want to get sendmail / > dovecot working. > > > [@mail conf.d]# dovecot --version > 2.2.10 > > [root@mail conf.d]# dovecot -n > # 2.2.10: /etc/dovecot/dovecot.conf > # OS: Linux 3.10.0-327.36.3.el7.i686 i686 CentOS Linux release 7.2.1511 > (AltArch) > auth_mechanisms = plain login > disable_plaintext_auth = no > > mail_location = mbox:~/mail:INBOX=/var/mail/%u > > mbox_write_locks = fcntl > namespace inbox { > inbox = yes > location = > mailbox Drafts { > special_use = \Drafts > } > mailbox Junk { > special_use = \Junk > } > mailbox Sent { > special_use = \Sent > } > mailbox "Sent Messages" { > special_use = \Sent > } > mailbox Trash { > special_use = \Trash > } > prefix = > } > passdb { > driver = pam > } > protocols = > ssl_cert = </etc/pki/dovecot/certs/dovecot.pem > ssl_key = </etc/pki/dovecot/private/dovecot.pem > userdb { > driver = passwd > } > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus >

2 1

Force a user to use POP3
by John Doe Vecot 18 Jul '18

18 Jul '18

[dovecot-2.3.2.1] I have dovecotrunning icw postfixandhave IMAP and POP3 available to retrieve mail. Can you tell me how I can configure Dovecot in order to force certain users to use POP3 (download messages) only? Thanks, Jos

3 2