- dovecot - dovecot.org

[dovecot] Extra help, Hotmail nightmare
by Jorge Bastos 28 Apr '15

28 Apr '15

Hi, Some extra help. How would I make hotmail accept my emails and not make them go to junk folder? Is there any trick to do this? Thanks in advanced, Jorge Bastos

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[patch] TLS Handshake failures can crash imap-login
by Hanno Böck 27 Apr '15

27 Apr '15

Hi, I tracked down a tricky bug in dovecot that can cause the imap-login and pop3-login processes to crash on handshake failures. This can be tested by disabling SSLv3 in the dovecot config (ssl_protocols = !SSLv2 !SSLv3) and trying to connect with openssl and forced sslv3 (openssl s_client -ssl3 -connect localhost:995). This would cause a crash. What was going on is this: In ssl-proxy-openssl.c in line 545 in the function ssl_step() the function ssl_handshake() is called. There SSL_accept() is called. If SSL_accept failes - because a client sent an invalid packet or something the server doesn't support or any other reason - ssl_handle_error() will be called. ssl_handle_error() will call ssl_proxy_destroy(). ssl_proxy_destroy() will then call ssl_proxy_flush(). And ssl_proxy_flush will call ssl_step() again. Here we have a loop. Now when SSL_accept() gets called again on the same context this is an invalid state for OpenSSL and it crashes. What to do? In essence, if ssl_proxy_destroy is called it shouldn't try to finish the handshake if the handshake hasn't even started due to an error. This can be done by a simple if check, see attached patch. I think this should do it. I have seen that a bug that is probably rootet in this has been posted here before regarding ssl3-disabled configs: http://dovecot.org/pipermail/dovecot/2015-March/100188.html cu, -- Hanno Böck http://hboeck.de/ mail/jabber: hanno(a)hboeck.de GPG: BBB51E42

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Using Identities to send Emails, question on Email Storage
by Kevin Laurie 27 Apr '15

27 Apr '15

hi, i was wondering that when sending mail with a different identity(bob(a)mydomain.com using help(a)mydomain.com identity), why does it not copy the message to help(a)mydomain.com(Sent box). instead it only shows it on bob(a)mydomain.com(Sent box). appreciate if someone could advise. could someone advise how to fix this as i would like to see the message in help(a)mydomain.com(SentBox) too. thanks kevin

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Re: Encrypt messages on filesystem
by Nicolás Reynolds 27 Apr '15

27 Apr '15

Jorge Bastos <mysql.jorge(a)decimal.pt> writes: > Hi, > > > > If for some reason I want the received messages to be automatic encrypted on > the file system, how should/to do it? > > If there's any nice howto out there please let me know. you can take a look at gpgit, there's a way to use it with pigeonhole -- }(:=

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TLS OCSP Stapling
by T.Tributh 26 Apr '15

26 Apr '15

Hi, is there a plan to support TLS OCSP stapling in the near future? Regards Torsten

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Encrypt messages on filesystem
by Jorge Bastos 26 Apr '15

26 Apr '15

Hi, If for some reason I want the received messages to be automatic encrypted on the file system, how should/to do it? If there's any nice howto out there please let me know. Thanks in advanced,

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prefetch not working (for me) on ldap user backend
by Hector M. Jacas 26 Apr '15

26 Apr '15

Dear Sir, I'm having problems with the implementation of prefetch userdb. Following the directives from the site (http://wiki2.dovecot.org/UserDatabase/Prefetch) I am unable to avoid the second search to the user backend (ldap). Could give me any advice or tips to achieve my goal? Thanks a lot, Hector M. Jacas My ldap has the following structure: search base: ou=Domains,dc=test,dc=local ******************************* domains tree: domain2.com: dc=domain2.com,ou=Domains,dc=test,dc=local Definition of mailuser1 on domail2.com: dn: uid=mailuser1,dc=domain2.com,ou=Domains,dc=test,dc=local uid: mailuser1 cn: User mailuser1 sn: User 1 displayName: User mailuser1 objectClass: inetOrgPerson objectClass: organizationalPerson objectClass: person objectClass: top mail: mailuser1(a)domain2.com ************************************* domain1.com: dc=domain1.com,ou=Domains,dc=test,dc=local Definition of mailuser1 on domain1.com: dn: uid=mailuser1,dc=domain1.com,ou=Domains,dc=test,dc=local uid: mailuser1 cn: User mailuser1 sn: User 1 displayName: User mailuser1 objectClass: inetOrgPerson objectClass: organizationalPerson objectClass: person objectClass: top mail: mailuser1(a)domain1.com ************************************* /etc/dovecot/dovecot-ldap.conf.ext content: hosts = ldapserver auth_bind = yes ldap_version = 3 tls = no base = ou=Domains,dc=test,dc=local scope = subtree user_filter = (&(objectclass=inetOrgPerson)(mail=%u)) user_attrs = =home=/var/vmail/mailboxes/%Ld/%Ln/%Ln,=uid=500,=gid=500 default_pass_scheme = CRYPT pass_filter = (&(objectclass=inetOrgPerson)(mail=%u)) pass_attrs = uid=user,password=userPassword,=userdb_home=/var/vmail/mailboxes/%Ld/%8Ln/%Ln, \ =userdb_uid=500,=userdb_gid=500 iterate_attrs = mail=user iterate_filter = (objectclass=inetOrgPerson) ************************************ auth test result for mailuser1(a)domain2.com: # doveadm mailuser1(a)domain2.com password auth test passdb: mailuser1(a)domain2.com auth succeeded Extra fields: user=mailuser1 And in /var/log/maillog (enabled debug auth options): Apr 26 14:00:33 nfs-7-00 dovecot: auth: Debug: auth client connected (pid=0) Apr 26 14:00:33 nfs-7-00 dovecot: auth: Debug: client in: AUTH 1 PLAIN service=doveadm resp=<hidden> Apr 26 14:00:33 nfs-7-00 dovecot: auth: Debug: ldap(mailuser1(a)domain2.com): bind search: base=ou=Domains,dc=test,dc=local filter=(&(objectclass=inetOrgPerson)(mail=mailuser1(a)domain2.com)) Apr 26 14:00:33 nfs-7-00 dovecot: auth: Debug: ldap(mailuser1(a)domain2.com): result: uid=mailuser1; uid unused Apr 26 14:00:33 nfs-7-00 dovecot: auth: Debug: auth(mailuser1(a)domain2.com): username changed mailuser1(a)domain2.com -> mailuser1 Apr 26 14:00:33 nfs-7-00 dovecot: auth: Debug: ldap(mailuser1): result: uid=mailuser1 Apr 26 14:00:33 nfs-7-00 dovecot: auth: Debug: client passdb out: OK 1 user=mailuser1 ***************************** mailuser1(a)domain2.com doveadm user result: # doveadm user mailuser1(a)domain2.com field value uid 500 gid 500 home /var/vmail/mailboxes/domain2.com/mailuser1/mailuser1 maildir mail: /var/vmail/mailboxes/domain2.com/mailuser/mailuser1:INDEX=MEMORY And in /var/log/maillog (enabled debug auth options): Apr 26 14:01:19 nfs-7-00 dovecot: auth: Debug: master in: USER 1 mailuser1(a)domain2.com service=doveadm Apr 26 14:01:19 nfs-7-00 dovecot: auth: Debug: prefetch(mailuser1(a)domain2.com): passdb didn't return userdb entries, trying the next userdb Apr 26 14:01:19 nfs-7-00 dovecot: auth: Debug: ldap(mailuser1(a)domain2.com): user search: base=ou=Domains,dc=test,dc=local scope=subtree filter=(&(objectclass=inetOrgPerson)(mail=mailuser1(a)domain2.com)) fields= Apr 26 14:01:19 nfs-7-00 dovecot: auth: Debug: ldap(mailuser1(a)domain2.com): result: uid=mailuser1 cn=Usuario mailuser1 sn=Usuario 1 displayName=Usuario mailuser1 objectClass=inetOrgPerson,inetOrgPerson,inetOrgPerson,inetOrgPerson mail=mailuser1(a)domain2.com; objectClass,cn,uid,mail,displayName,sn unused Apr 26 14:01:19 nfs-7-00 dovecot: auth: Debug: ldap(mailuser1(a)domain2.com): result: uid=mailuser1 cn=Usuario mailuser1 sn=Usuario 1 displayName=Usuario mailuser1 objectClass=inetOrgPerson,inetOrgPerson,inetOrgPerson,inetOrgPerson mail=mailuser1(a)domain2.com; objectClass,cn,uid,mail,displayName,sn unused Apr 26 14:01:19 nfs-7-00 dovecot: auth: Debug: userdb out: USER 1 mailuser1(a)domain2.com home=/var/vmail/mailboxes/domain2.com/mailuser1/mailuser1 uid=500 gid=500 *************************** My base system is RHEL7, 24 CPUs and 16GB ram and for LDAP backend, 389 DS 1.2.2 on RHEL 6.6 2.2.10: /etc/dovecot/dovecot.conf # OS: Linux 3.10.0-123.20.1.el7.x86_64 x86_64 Red Hat Enterprise Linux Server release 7.0 (Maipo) nfs4 auth_debug = yes auth_mechanisms = plain login auth_verbose = yes default_client_limit = 50000 disable_plaintext_auth = no listen = * mail_fsync = always mail_gid = 500 mail_location = maildir:/var/vmail/mailboxes/%d/%8n/%n:INDEX=MEMORY mail_nfs_index = yes mail_nfs_storage = yes mail_uid = 500 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 ihave mmap_disable = yes 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 { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } service auth { unix_listener auth-userdb { group = vmail mode = 0640 user = vmail } } service doveadm { inet_listener { port = 24245 } } service imap-login { process_min_avail = 24 service_count = 0 } service imap-urlauth-worker { chroot = client_limit = 1 drop_priv_before_exec = no executable = imap-urlauth-worker extra_groups = group = idle_kill = 0 privileged_group = process_limit = 8192 process_min_avail = 0 protocol = imap service_count = 1 type = unix_listener imap-urlauth-worker { group = mode = 0600 user = $default_internal_user } user = vsz_limit = 18446744073709551615 B } service imap-urlauth { chroot = client_limit = 1 drop_priv_before_exec = no executable = imap-urlauth extra_groups = group = idle_kill = 0 privileged_group = process_limit = 8192 process_min_avail = 0 protocol = imap service_count = 1 type = unix_listener token-login/imap-urlauth { group = mode = 0666 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service imap { process_limit = 8192 } service pop3-login { process_min_avail = 24 } ssl_cert = </etc/pki/dovecot/certs/dovecot.pem ssl_key = </etc/pki/dovecot/private/dovecot.pem userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } protocol imap { mail_max_userip_connections = 1000 } local 172.28.200.0/24/24 { doveadm_password = secret } --- This message was processed by Kaspersky Mail Gateway 5.6.28/RELEASE running at host imx3.etecsa.cu Visit our web-site: <http://www.kaspersky.com>, <http://www.viruslist.com>

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dovecot crash with virtual folders (debian testing version 2.2.13-11)
by James Bottomley 25 Apr '15

25 Apr '15

The virtual folder triggering the crash has the configuration namespace { prefix = virtual/ separator = / location = virtual:~/Maildir/virtual } And the actual virtual/openstack/dovecot-virtual file is Lists/openstack-dev inthread refs or from "james bottomley" keyword thread It's a standard search for threads I've either replied to or marked with an imap keyword 'thread' The imap command 0 status virtual/openstack (MESSAGES UNSEEN RECENT) Is crashing most of the time with gdb /usr/lib/dovecot/imap GNU gdb (Debian 7.7.1+dfsg-5) 7.7.1 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i586-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/lib/dovecot/imap...Reading symbols from /usr/lib/debug//usr/lib/dovecot/imap...done. done. (gdb) r Starting program: /usr/lib/dovecot/imap process 7868 is executing new program: /usr/bin/doveconf process 7868 is executing new program: /usr/lib/dovecot/imap * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS SPECIAL-USE BINARY MOVE] Logged in as jejb 0 status virtual/openstack (MESSAGES UNSEEN RECENT) Program received signal SIGSEGV, Segmentation fault. 0xb7f0814b in mail_search_args_deinit_sub (args=args@entry=0x8005caf0, arg=0x8005cb08) at mail-search.c:169 169 mail-search.c: No such file or directory. (gdb) bt #0 0xb7f0814b in mail_search_args_deinit_sub (args=args@entry=0x8005caf0, arg=0x8005cb08) at mail-search.c:169 #1 0xb7f08aea in mail_search_args_deinit (args=0x8005caf0) at mail-search.c:193 #2 0xb7d9ecf1 in virtual_mailbox_close_internal (mbox=mbox@entry=0x800585d0) at virtual-storage.c:253 #3 0xb7d9ed7b in virtual_mailbox_close (box=0x800585d0) at virtual-storage.c:307 #4 0xb7f403ff in mail_thread_mailbox_close (box=0x800585d0) at index-thread.c:628 #5 0xb7f0d3fe in mailbox_close (box=0x800585d0) at mail-storage.c:1182 #6 0xb7f0d472 in mailbox_free (_box=0xbffff878) at mail-storage.c:1197 #7 0x8001e0ae in imap_status_get (cmd=0x80053948, ns=0x80052220, mailbox=0x8003a250 "virtual/openstack", items=0xbffff8f8, result_r=0xbffff900) at imap-status.c:96 #8 0x80011f64 in cmd_status (cmd=0x80053948) at cmd-status.c:40 #9 0x80016847 in command_exec (cmd=0x80053948) at imap-commands.c:158 #10 0x800155cb in client_command_input (cmd=0x80053948) at imap-client.c:778 #11 0x80015719 in client_command_input (cmd=0x80053948) at imap-client.c:839 #12 0x800159cd in client_handle_next_command (remove_io_r=<synthetic pointer>, client=0x80052ee0) at imap-client.c:877 #13 client_handle_input (client=0x80052ee0) at imap-client.c:889 #14 0x80015dd5 in client_input (client=0x80052ee0) at imap-client.c:931 ---Type <return> to continue, or q <return> to quit--- #15 0xb7e202e3 in io_loop_call_io (io=0x800538c8) at ioloop.c:441 #16 0xb7e214be in io_loop_handler_run_internal (ioloop=0x80042458) at ioloop-epoll.c:220 #17 0xb7e2036a in io_loop_handler_run (ioloop=0x80042458) at ioloop.c:488 #18 0xb7e203f9 in io_loop_run (ioloop=0x80042458) at ioloop.c:465 #19 0xb7dc6985 in master_service_run (service=0x80042380, callback=0x800200b0 <client_connected>) at master-service.c:566 #20 0x80008b44 in main (argc=1, argv=0xbffffd84) at main.c:400 I thought it might be this patch http://hg.dovecot.org/dovecot-2.2/rev/5c6f49e2d8d9 But after applying I still get the same segfault. James

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Auth-worker, Unknown User
by Stephen R Guglielmo 25 Apr '15

25 Apr '15

Hi list, I'm running Debian Jessie (8). I have Postfix and Dovecot working successfully. I attempted to setup LMTP in order to enable sieve support, but it seems I was not successful. Dovecot version 2.2.13. Postfix accepts an incoming test mail I sent, then tries to deliver it to Dovecot via LMTP: dovecot: lmtp(13493): Connect from local dovecot: auth-worker(13495): pam(srg(a)example.com): unknown user dovecot: lmtp(13493): Disconnect from local: Successful quit Postfix then bounces my mail with a "550 User doesn't exist." It seems that Dovecot is trying to lookup my whole address (srg(a)example.com) in PAM instead of just the username ("srg"), which does exist. What can I do to avoid this? I have searched the internet about this and found a few references to "args = %s" and "args = username_format=%n" for passdb and/or userdb, but I have tried both (restarting Dovecot) to no avail. Thank you! `doveconf -n` below: # 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-042stab103.6 x86_64 Debian 8.0 auth_verbose = yes first_valid_uid = 1000 last_valid_uid = 1000 listen = 167.114.96.243, 2607:5300:100:200::fce lmtp_save_to_detail_mailbox = yes mail_location = maildir:~/Maildir 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 } plugin { recipient_delimiter = + sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = " imap lmtp" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 0 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl_cert = </etc/ssl/private/dovecot.cacert.pem ssl_cipher_list = HIGH:!aNULL:!eNULL:!EXP:!SSLv2 ssl_dh_parameters_length = 2048 ssl_key = </etc/ssl/private/dovecot.privkey.pem ssl_prefer_server_ciphers = yes ssl_protocols = TLSv1 TLSv1.1 TLSv1.2 userdb { driver = passwd } protocol lmtp { mail_plugins = sieve }

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Performance
by absolutely_free＠libero.it 24 Apr '15

24 Apr '15

Hi, at moment I have this environment: CentOS nginx + phpfpm Dovecot, with Maildir format Postfix Roundcube MySQL backend about 10000 mailusers dual core Intel(R) Pentium(R) D CPU 3.00GHz 8 GB RAM network storage device (Coraid), ext4 file system I have no performance issue now, but I need to move to a different server: FreeBSD 10.1-RELEASE nginx + phpfpm Dovecot Postfix Roundcube dual core Intel(R) Xeon(R) CPU 5120 @ 1.86GHz 16 GB RAM local storage with zfs file system My question is: is better to use SQLite instead of MySQL? Should I prefer dbox format? Thank you in advance for your opinion!

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