- dovecot - dovecot.org

decrypt.rb
by Dave 11 Apr '23

11 Apr '23

Per the Dovecot site here: https://wiki.dovecot.org/Plugins/MailCrypt ... the "decrypt.rb" ruby script can be used to decrypt a Dovecot-encrypted message file from the command line. The script sort of runs successfully for me, in the sense that it doesn't error out, but it doesn't show the decrypted message. I've called it like so: decrypt.rb -k <PATH_TO_DOVECOT_KEYFILE> -f ./encrypted_message But when I do it just displays the info below and exits (I've subbed <DATA> tags for the actual data): ------------------[OUTPUT]----------------------- Key(s) (total: 1) - Key type : EC - Key digest: <DATA1> - Peer key : <DATA2> - Encrypted : <DATA3> - Kd hash : <DATA4> ------------------------------------------------------- I've tried specifying an output file as well, per the script's command line options, but the output file is 0 bytes. Does anyone have any suggestions? I *think* I'm using it the way it's intended to be used, but maybe I'm not?! -Dave

5 14

None
by None 11 Apr '23

11 Apr '23

... - maildir: change it to use '/' as hierarchy separator to allow '.' characters (for usernames in shared folders) ... Now changing the separator in the maildir-storage.c is trivial (even though it "can't" be changed :-), but fixing the resultant breakage in maildir-list.c needs a little more understanding. Timo, could you give me some pointers? I can see that I need to work out what imap_match_init() does. My motivation is to follow up on an earlier thread about reusing .mailboxlist files as .subscription files, preferably without rewriting them to replace the slashes with something else. Thanks -- Charlie

1 0

None
by None 11 Apr '23

11 Apr '23

checking IMAP connection. Based on that experimentation, it seems that when I try to verify certificate files with openssl, all checks out, but when I try to check thing through IMAPS, things go ugly (see log below). If I try same openssl s_client command on my web server, it gets everything correctly. As result from this one, I've even tried to use certificate from my web server with IMAP and even then openssl keeps on saying that there is bad record mac. Is this bug in dovecot's SSL handling or have I managed to mess something in my setup? URLS: CA cert: http://jylitalo.homeip.net/ca/ca.crt IMAPD cert: http://jylitalo.homeip.net/ca/imapd.crt [log starts] bash-2.05a$ openssl verify -CAfile /usr/local/www/data/ca/ca.crt /etc/ssl/certs/imapd.crt /etc/ssl/certs/imapd.crt: OK bash-2.05a$ openssl s_client -host localhost -port 993 -CAfile /usr/local/www/data/ca/ca.crt -verify -debug verify depth is 0 CONNECTED(00000003) depth=1 /C=FI/ST=Finland/L=Helsinki/O=Juha Ylitalo/CN=Juha Ylitalo/Email=jylitalo(a)iki.fi verify return:1 depth=0 /C=FI/ST=Finland/O=Juha Ylitalo/CN=coat.st-paul/Email=jylitalo(a)iki.fi verify return:1 47169:error:140943FC:SSL routines:SSL3_READ_BYTES:sslv3 alert bad record mac:/usr/src/secure/lib/libssl/../../../crypto/openssl/crypto/../ssl/s3_pkt.c:1046:SSL alert number 20 47169:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:/usr/src/secure/lib/libssl/../../../crypto/openssl/crypto/../ssl/s23_lib.c:226: bash-2.05a$ [log ends] -- Juha Ylitalo juha.o.ylitalo(a)nokia.com <work e-mail> +358 40 562 6152 http://linux.nokia.com/~jylitalo/ <work www>

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None
by None 11 Apr '23

11 Apr '23

while (rename(src, dest) < 0 && count < 2) { if (errno != EEXIST) { rename can never return EEXIST in errno. maildir-save.c, line 124. /* move the file into new/ directory - syncing will pick it up from there */ if (rename(tmp_path, new_path) == 0) failed = FALSE; Here you can lose emails if the new/ folder contains a message whose base name is equal. The only way to avoid this is: 1) use link and unlink, not rename 2) leave messages that have a time_t part equal to or higher than time(NULL). Anyway, Maildir has a strict consistency criteria which says that all messages that are linked from tmp/ into new/ _must_ use time(NULL) plus a number that is guaranteed not to lapse within one second, and which does not collide with other messages in new/. new/ is the single entry point into cur/, and messages in new/ can not be "older" than the messages in cur/. The simple reasoning for this is that you can never guarantee that there is no message in cur/ that has the same base name, but perhaps different flags. It follows that when moving a message from new/ to cur/, it is required that the server only picks messages that are older than one second. Andy -- Andreas Aardal Hanssen http://www.andreas.hanssen.name/gpg

1 0

auth-worker fatal signal 11 core dump
by Anthony Carrico 07 Apr '23

07 Apr '23

I'm testing out dovecot/tls/openldap(via portunus). It seems to work fine. I can access Maildir with Thunderbird as expected. However according to the logs, auth-worker crashes when slapd closes: Apr 04 22:11:56 silver slapd[1745983]: conn=1054 op=1 UNBIND Apr 04 22:11:56 silver slapd[1745983]: conn=1054 fd=14 closed Apr 04 22:11:56 silver slapd[1745983]: conn=1053 op=2 UNBIND Apr 04 22:11:56 silver slapd[1745983]: conn=1053 fd=13 closed Apr 04 22:11:56 silver dovecot[2083465]: auth-worker: Fatal: master: service(auth-worker): child 2084984 killed with signal 11 (core dumped) Apr 04 22:11:56 silver dovecot[2083465]: auth: Fatal: master: service(auth): child 2084981 killed with signal 11 (core dumped) Here is the configuration. It is a minimal setup, just testing ldap for passdb: # 2.3.19.1 (9b53102964): /etc/dovecot/dovecot.conf # OS: Linux 6.1.7 x86_64 NixOS 22.11 (Raccoon) btrfs # Hostname: silver auth_mechanisms = plain login base_dir = /run/dovecot2 default_internal_group = dovecot2 default_internal_user = dovecot2 mail_location = maildir:/home/%n/Maildir:INBOX=/var/spool/mail/%n:INDEX=/var/lib/dovecot/indexes/%n:LAYOUT=Maildir++ passdb { args = /var/lib/dovecot/etc/dovecot-ldap.conf.ext driver = ldap } pop3_uidl_format = %08Xv%08Xu protocols = imap sendmail_path = /run/wrappers/bin/sendmail service auth { user = root } ssl_ca = </var/certs/.minica/cert.pem ssl_cert = </var/certs/silver/cert.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { driver = passwd } Here is the ldap config: uris = ldaps://silver tls_ca_cert_file = "/var/certs/.minica/cert.pem" auth_bind = yes auth_bind_userdn = uid=%u,ou=users,dc=silver base = dc=silver Here is the stack trace: PID: 2084981 (auth) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Tue 2023-04-04 22:11:56 EDT (11h ago) Command Line: dovecot/auth Executable: /nix/store/s72dc8pc6g70dscya8ggsvn61rnfhixy-dovecot-2.3.19.1/libexec/dovecot/auth Control Group: /system.slice/dovecot2.service Unit: dovecot2.service Slice: system.slice Hostname: silver Storage: /var/lib/systemd/coredump/core.auth.0.9fed479ad6ac4f0e8c2d5f290d9ea3f5.2084981.1680660716000000.zst (present) Disk Size: 324.7K Message: Process 2084981 (auth) of user 0 dumped core. Module linux-vdso.so.1 with build-id 7aefd45ed44b5302cf82d7b5093cd9b882b8bc8a Module legacy.so with build-id fdd26faf7ff15c8fa78ef2091d38c5fb886da146 Module libscram.so.3 without build-id. Module libdb-5.3.so without build-id. Module libsasldb.so.3 without build-id. Module libplain.so.3 without build-id. Module libotp.so.3 without build-id. Module liblogin.so.3 without build-id. Module libgssapiv2.so.3 without build-id. Module libkeyutils.so.1 without build-id. Module libkrb5support.so.0 without build-id. Module libcom_err.so.3 without build-id. Module libk5crypto.so.3 without build-id. Module libkrb5.so.3 without build-id. Module libgssapi_krb5.so.2 without build-id. Module libgs2.so.3 without build-id. Module libdigestmd5.so.3 without build-id. Module libcrammd5.so.3 without build-id. Module libanonymous.so.3 without build-id. Module libresolv.so.2 with build-id 6bcddb1dd1be5b345df903815f364e5d967ae0ef Module libdl.so.2 with build-id 2e86539e324ffb14e185718fd284d3f3f2568f06 Module libm.so.6 with build-id 5cc630080219b350d8f9e4573c65d2dd931ea978 Module libz.so.1 without build-id. Module ld-linux-x86-64.so.2 with build-id 3be2bc3749163683f612e0fb8169ce51f75742fe Module libcrypto.so.3 with build-id ca321413716a256baa08042cb3f3c07a90cc82ce Module libssl.so.3 with build-id 4bf2aae91a0d91b0ca0a6fe1ab29b2b7653a17f6 Module libsasl2.so.3 without build-id. Module libaudit.so.1 without build-id. Module libc.so.6 with build-id 3d6884d200ead572b7b89a4133f645c7a3c039ed Module libpthread.so.0 with build-id 0f7050f6ef81222c7290351dfa67e5e062c797bf Module libsqlite3.so.0 with build-id 174a69054606e27a1c555838b07035346e83bfb0 Module libsodium.so.23 with build-id 1c1e5b232aa14bf5c942b3568bf70713da9ad11f Module liblber.so.2 without build-id. Module libldap.so.2 without build-id. Module libpam.so.0 without build-id. Module libcrypt.so.1 without build-id. Module libdovecot.so.0 without build-id. Module libstats_auth.so without build-id. Module auth without build-id. Stack trace of thread 2084981: #0 0x00007f824e28e824 pthread_rwlock_rdlock(a)GLIBC_2.2.5 (libc.so.6 + 0x8e824) #1 0x00007f824de312d9 CRYPTO_THREAD_read_lock (libcrypto.so.3 + 0x2312d9) #2 0x00007f824de1ea57 ossl_lib_ctx_get_data (libcrypto.so.3 + 0x21ea57) #3 0x00007f824de2d460 ossl_provider_deregister_child_cb (libcrypto.so.3 + 0x22d460) #4 0x00007f824de1e960 OSSL_LIB_CTX_free (libcrypto.so.3 + 0x21e960) #5 0x00007f824d8d4801 legacy_teardown (legacy.so + 0x7801) #6 0x00007f824de2ebfd ossl_provider_free (libcrypto.so.3 + 0x22ebfd) #7 0x00007f824ddf535b evp_cipher_free_int (libcrypto.so.3 + 0x1f535b) #8 0x00007f824e4cd46c SSL_CTX_free (libssl.so.3 + 0x3d46c) #9 0x00007f824e7852f5 ldap_int_tls_destroy (libldap.so.2 + 0x3d2f5) #10 0x00007f824e9ddbde _dl_fini (ld-linux-x86-64.so.2 + 0x5bde) #11 0x00007f824e2400c5 __run_exit_handlers (libc.so.6 + 0x400c5) #12 0x00007f824e24024e exit (libc.so.6 + 0x4024e) #13 0x00007f824e229255 __libc_start_call_main (libc.so.6 + 0x29255) #14 0x00007f824e229309 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x29309) #15 0x000055b07d5c7675 _start (auth + 0x18675) ELF object binary architecture: AMD x86-64 As you can see, it seems to be crashing in the exit-handlers. Anyway, I thought I should report the crash I was observing. Thank you -- Anthony Carrico

2 4

Error: /proc/self/status is larger than expected
by Elisamuel Resto Donate 06 Apr '23

06 Apr '23

Hello, Writing to get some insight as to how I might rid myself of a the pesky error message on the subject. Every binary throws out that error, every LMTP delivery... basically every time any dovecot binary is executed. I am unsure if this is configuration related or not, but intuition says it is an issue with a kernel feature or compiler issue. I saw the error message in the source code (file ), but I don't understand enough of the dovecot architecture or what the code itself is doing in this case. Below and excerpt of a few lines of logs. Since I don't know what specifically this would relate to (and I don't quite remember the command to send the "safe" version of the configuration), I am sending this message in hopes that whatever is needed can be asked and I will provide it. Regards, -Sam [... postfix and rspamd output...] Mar 20 22:17:02 gaia postfix/qmgr[21403]: 4PgcGQ33LfzdT4h: from=<list(a)someml.tld>, size=12064, nrcpt=1 (queue active) Mar 20 22:17:02 gaia postfix/smtpd[18941]: disconnect from some.list.server[1.2.3.4] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7 Mar 20 22:17:02 gaia dovecot: lmtp(18954): Error: /proc/self/status is larger than expected Mar 20 22:17:02 gaia dovecot: lmtp(18954): Connect from local Mar 20 22:17:02 gaia dovecot: lmtp(sam(a)samresto.dev)<18954><vbRKLa4hGWQKSgAAw1YR2w>: Error: /proc/self/status is larger than expected Mar 20 22:17:02 gaia dovecot: message repeated 2 times: [ lmtp(sam(a)samresto.dev)<18954><vbRKLa4hGWQKSgAAw1YR2w>: Error: /proc/self/status is larger than expected] Mar 20 22:17:02 gaia dovecot: lmtp(sam(a)samresto.dev)<18954><vbRKLa4hGWQKSgAAw1YR2w>: sieve: msgid=<84cf4a75-db54-f33c-cea2-f4772cd182d8(a)samresto.dev>: fileinto action: stored mail into mailbox 'Lists/Folder' Mar 20 22:17:02 gaia dovecot: lmtp(sam(a)samresto.dev)<18954><vbRKLa4hGWQKSgAAw1YR2w>: Error: /proc/self/status is larger than expected Mar 20 22:17:02 gaia dovecot: indexer-worker(sam(a)samresto.dev)<18956><vbRKLa4hGWQKSgAAw1YR2w:RtkiMa4hGWQMSgAAw1YR2w>: Error: /proc/self/status is larger than expected Mar 20 22:17:02 gaia postfix/lmtp[18943]: 4PgcGQ33LfzdT4h: to=<sam(a)samresto.dev>, relay=wyvern.samresto.dev[private/dovecot-lmtp], delay=0.4, delays=0.31/0/0.01/0.07, dsn=2.0.0, status=sent (250 2.0.0 <sam(a)samresto.dev> vbRKLa4hGWQKSgAAw1YR2w Saved) Mar 20 22:17:02 gaia dovecot: lmtp(18954): Disconnect from local: Logged out (state=READY) Mar 20 22:17:02 gaia dovecot: lmtp(18954): Error: /proc/self/status is larger than expected Mar 20 22:17:02 gaia postfix/qmgr[21403]: 4PgcGQ33LfzdT4h: removed

6 11

Email not working
by Michael Hooker 05 Apr '23

05 Apr '23

Hi, First of all may I say I am not an expert on Dovecot so please forgive me if the answer to my query is obvious. After upgrading from Ubuntu 20.04 to 22.04 my email is not working. root@mail:~# doveconf -n # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.16 (09c29328) # OS: Linux 5.15.0-60-generic x86_64 Ubuntu 22.04.1 LTS # Hostname: mail.odysseytours.nz auth_debug = yes auth_mechanisms = plain login auth_username_format = %{if;%d;eq;mail.odysseytours.nz;%Ln;%Lu} listen = *, :: mail_debug = yes mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_privileged_group = mail 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 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 { sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = " imap lmtp sieve pop3" service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </etc/dovecot/private/dovecot.pem ssl_cipher_list = EECDH+CHACHA20:EECDH+AESGCM:EDH+AESGCM:AES256+EECDH ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = blocking=no driver = passwd } root@mail:~# doveadm user -f 'username' '*' nobody mike systemd-coredump sogo vmail mlmmj iredadmin iredapd snapd-range-524288-root snap_daemon Error: auth-master: userdb list: User listing returned failure Fatal: user listing failed root@mail:~# doveadm index -A -q \* doveadm(nobody): Error: mkdir(/nonexistent/mail/.imap) failed: Permission denied (euid=65534(nobody) egid=65534(nogroup)) doveadm(systemd-coredump): Error: mkdir(//mail/.imap) failed: Permission denied (euid=999(systemd-coredump) egid=999(systemd-coredump) missing +w perm: /, dir owned by 0:0 mode=0755) doveadm(snapd-range-524288-root): Error: mkdir(/nonexistent/mail/.imap) failed: Permission denied (euid=524288(snapd-range-524288-root) egid=524288(snapd-range-524288-root)) doveadm(snap_daemon): Error: mkdir(/nonexistent/mail/.imap) failed: Permission denied (euid=584788(snap_daemon) egid=584788(snap_daemon)) doveadm(3015804): Error: auth-master: userdb list: User listing returned failure doveadm: Error: Failed to iterate through some use Contents of /etc/dovecot/conf.d/10-auth.conf with all comments removed: auth_username_format=%{if;%d;eq;mail.odysseytours.nz;%Ln;%Lu} #https://serverfault.com/questions/260488/dovecot-user-lookup-fails-when-using-usernamedomain-format auth_mechanisms = plain login !include auth-system.conf.ext Contents of /etc/dovecot/conf.d/auth-system.conf.ext with all comments removed: passdb { driver = pam } userdb { driver = passwd ##https://doc.dovecot.org/configuration_manual/authentication/passwd/#authentication-passwd args = blocking=no } It says "Authentication failure (Password mismatch?)" but its definitely the correct password. root@mail:/home/mike# doveadm log errors Feb 22 02:43:48 Error: auth: passwd(postmaster(a)odysseytours.nz): getpwnam() failed: Address Don't know what this error means. root@mail:/home/mike# doveadm log errors Feb 22 02:43:48 Error: auth: passwd(postmaster(a)odysseytours.nz): getpwnam() failed: Address family not supported by protocol Don't know what this error means. Any help would be greatly appreciated.

2 1

Wildcard delivery from Postfix to Dovecot LDA issues
by EML 01 Apr '23

01 Apr '23

[apologies for postfix/dovecot cross-post] How, exactly, do postfix and dovecot communicate when postfix attempts to determine whether to deliver a message to the dovecot LDA, or to bounce it? In other words, how does postfix decide to bounce foo, and deliver bar, in these log messages: postfix/pipe[11857]: 933BCA071A: to=<foo(a)example.com>, relay=dovecot, ... status=bounced (user unknown) postfix/pipe[12266]: 8AD51A071A: to=<bar(a)example.com>, relay=dovecot, ... status=sent (delivered via dovecot service) The reason I ask is that the obvious answer with the main.cf setup doesn't appear to be sufficient, and dovecot appears to check whether or not the recipient exists in the userdb passwd file before allowing delivery. I have postfix set up for virtual hosts, as follows: virtual_mailbox_domains = example.com, sub.example.com virtual_mailbox_maps = hash:/var/www1/vdomains virtual_transport = dovecot where vdomains contains: bar(a)sub.example.com example.com/test/ bar(a)example.com example.com/test/ @sub.example.com example.com/test/ @example.com example.com/test/ postfix will deliver to bar(a)example.com, but not foo(a)example.com. I can't deliver anything to the subdomain. The interesting thing is that 'bar' already has a dovecot mailbox (the 'test' mailbox), but 'foo' doesn't. If this is correct, how do I do wildcard deliveries to dovecot, particularly for the subdomain?

2 2

Dovecot error invalid service_fd
by Michel Verdier 30 Mar '23

30 Mar '23

Hi all On debian stable, dovecot 2.3.13+dfsg1-2+deb11u1 and postfix 3.5.17-0+deb11u1 I set postfix sending mails to dovecot for mailbox storage: mailbox_transport = lmtp:unix:private/dovecot-lmtp dovecot listen with lmtp: service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { mode = 0666 user = postfix group = postfix } } passdb { driver = pam args = session=yes cache_key=%u%r%l dovecot } userdb { driver = passwd } # ls -l /var/spool/postfix/private/dovecot-lmtp srw-rw-rw- 1 postfix postfix 0 27 mars 11:24 /var/spool/postfix/private/dovecot-lmtp I get logs like this: postfix/lmtp[271076]: 6DB551008B3C1: to=..., relay=...[private/dovecot-lmtp], delay=0.7, delays=0.29/0.04/0.11/0.26, dsn=2.0.0, status=sent (250 2.0.0 ... postfix/qmgr[197419]: 6DB551008B3C1: removed dovecot: lmtp(271077): Disconnect from local: Client has quit the connection (state=READY) dovecot: log(253615): Error: Received master input for invalid service_fd 27: 27 271079 BYE I identify 271079 as the pid for dovecot auth worker process. If I add a timeout in dovecot: service auth-worker { idle_kill = 10s } Then I see error log coming 10 seconds after the end of every lmtp connexion from postfix. There is no other log messages around even with debug enable in dovecot. And mails are correctly delivered. Am I missing something or is this to be ignored? Cheers

1 0

Dovecot submission proxy constraints
by Peter Wienemann 29 Mar '23

29 Mar '23

Dear Dovecot experts, in 2017 Stephan Bosch mentioned in an email about the Dovecot submission proxy [0]: "The current implementation does require that the proxy has direct access to the user's mailbox for BURL (e.g. by running it on the same host as imap), but that restriction should be resolved soon, allowing for more complex setups." Is the mentioned restriction (access to mailbox) still valid in 2023 or has this constraint been lifted in the meantime? Best regards, Peter [0] https://dovecot.org/pipermail/dovecot/2017-December/110282.html

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