January 2022 - dovecot

Set mail crypt private password with OAUTH?
by Max Kostikov 31 Jan '22

31 Jan '22

We currently use Dovecot and mailbox encryption via the mail-crypt-plugin. With standard password authentication, we set the value of the individual password to encrypt the contents of the userdb_mail_crypt_private_password mailbox in the SQL query. Is it possible to set the userdb_mail_crypt_private_password value when authenticating via OAUTH2 ? -- Best regards, Max Kostikov

3 16

PLAIN password scheme issue with {}
by Kris von Mach 31 Jan '22

31 Jan '22

Hello, Using PLAIN password scheme and a user having a password with {} for example {RnDR8DaD} causes the authentication to fail: auth-worker(85632): Error: conn unix:auth-worker (uid=143): auth-worker<3333>: sql(user(a)domain.com,123.45.68.78,<EBh0ouPWULvTF5AQ>): Unknown scheme RnDR8DaD Is there some sort of a workaround for this other than requesting user not to use {} at beginning and end of their password?

2 1

silly quesiton
by steph.mag220＠netcourrier.com 31 Jan '22

31 Jan '22

Hi, Up to now, I used PAM of each user in order to send and receive email. ( BTW, sending email, a use authentication was required and we used the login and passwd of the user on the system Now, for dovecot, I start to use MD5 passwrd.. and that sounds to be OK auth_mechanisms = plain login cram-md5 passdb { driver = passwd-file # Path for passwd-file. Also set the default password scheme. args = scheme=cram-md5 /etc/cram-md5.pwd } But changing the passwrd for the user1.. he can retrieve emails from dovecot, but cannot send anymore, because sending emails kept the old passwrd. ( using the PAM) 1) How can I says sendmail to use the same passwd file ( with MD5) than dovecot ? 2) Ideally, I would like to create virtual users for the same mailbox Is that possible ? like 2 files Users and PAsswrds pointing out the mailbox : maildir :/home/mailbox/user1 ex : user1(a)foo.com passwrd1 /home/mailbox/generic_mails and user2 passwrd2 home/mailbox/generic_mails How can I do that ? Thanks for your help

14 35

Re: dovecot Digest, Vol 225, Issue 73
by David Matthews 31 Jan '22

31 Jan '22

> 5. Re: can't authenticate (Christian Mack) hi Christian log with debugging resulting from a login attempt pasted at end - to try and make it more readable I removed everything in each line up to "dovecot:" At no point is a password revealed, even in hashed form. Should also say that the problem is identical on a backup laptop also running devuan 4; I'm not sure if I ever used that machine with dovecot before it was upgraded from devuan 3. Also I tried creating a new user to see if that account could authenticate; it cannot. >So you only can increase the logging in dovecot for authentication to >debugging. >auth_debug=yes ________________________________________________________________________________ auth: Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth auth: Debug: Module loaded: /usr/lib/dovecot/modules/auth/lib20_auth_var_expand_crypt.so auth: Debug: Read auth token secret from /run/dovecot/auth-token-secret.dat auth: Debug: auth client connected (pid=2467) auth: Debug: client in: AUTH#0111#011PLAIN#011service=imap#011secured#011session=osv6w6PW4tB/AAAB#011lip=127.0.0.1#011rip=127.0.0.1#011lport=143#011rport=53474#011resp=<hidden> auth: Debug: pam(fred,127.0.0.1,<osv6w6PW4tB/AAAB>): Performing passdb lookup auth-worker(2469): Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth auth-worker(2469): Debug: Module loaded: /usr/lib/dovecot/modules/auth/lib20_auth_var_expand_crypt.so auth-worker(2469): Debug: conn unix:auth-worker (pid=2468,uid=118): Server accepted connection (fd=13) dovecot: auth-worker(2469): Debug: conn unix:auth-worker (pid=2468,uid=118): Sending version handshake auth-worker(2469): Debug: conn unix:auth-worker (pid=2468,uid=118): auth-worker<1>: Handling PASSV request auth-worker(2469): Debug: conn unix:auth-worker (pid=2468,uid=118): auth-worker<1>: pam(fred,127.0.0.1,<osv6w6PW4tB/AAAB>): Performing passdb lookup auth-worker(2469): Debug: conn unix:auth-worker (pid=2468,uid=118): auth-worker<1>: pam(fred,127.0.0.1,<osv6w6PW4tB/AAAB>): lookup service=dovecot auth-worker: Error: fatal error: failed to reserve page summary memory auth-worker(2469): Debug: conn unix:auth-worker (pid=2468,uid=118): auth-worker<1>: pam(fred,127.0.0.1,<osv6w6PW4tB/AAAB>): #1/1 style=1 msg=Password: auth-worker: Error: auth-worker: Error: runtime stack: auth-worker: Error: runtime.throw(0x7f3b2a6a8292, 0x25) auth-worker: Error: #011runtime/panic.go:1116 +0x74 fp=0x7f3b2a3b5b30 sp=0x7f3b2a3b5b00 pc=0x7f3b2a4d6474 auth-worker: Error: runtime.(*pageAlloc).sysInit(0x7f3b2a894428) auth-worker: Error: #011runtime/mpagealloc_64bit.go:80 +0x185 fp=0x7f3b2a3b5bc0 sp=0x7f3b2a3b5b30 pc=0x7f3b2a4ccb25 auth-worker: Error: runtime.(*pageAlloc).init(0x7f3b2a894428, 0x7f3b2a894420, 0x7f3b2a8aeb18) auth-worker: Error: #011runtime/mpagealloc.go:317 +0x77 fp=0x7f3b2a3b5be8 sp=0x7f3b2a3b5bc0 pc=0x7f3b2a4ca517 auth-worker: Error: runtime.(*mheap).init(0x7f3b2a894420) auth-worker: Error: #011runtime/mheap.go:743 +0x24b fp=0x7f3b2a3b5c10 sp=0x7f3b2a3b5be8 pc=0x7f3b2a4c74cb auth-worker: Error: runtime.mallocinit() auth-worker: Error: #011runtime/malloc.go:480 +0x109 fp=0x7f3b2a3b5c38 sp=0x7f3b2a3b5c10 pc=0x7f3b2a4acc09 auth-worker: Error: runtime.schedinit() auth-worker: Error: #011runtime/proc.go:563 +0x65 fp=0x7f3b2a3b5c90 sp=0x7f3b2a3b5c38 pc=0x7f3b2a4d9e25 auth-worker: Error: runtime.rt0_go(0x7ffd65c5e428, 0x2, 0x7ffd65c5e428, 0x7f3b2a3b6700, 0x7f3b2af22ea7, 0x0, 0x7f3b2a3b6700, 0x7f3b2a3b6700, 0xbe848d2612a1e5f4, 0x7ffd65c5cabe, ...) auth-worker: Error: #011runtime/asm_amd64.s:214 +0x129 fp=0x7f3b2a3b5c98 sp=0x7f3b2a3b5c90 pc=0x7f3b2a508c09 auth: Error: auth worker: Aborted PASSV request for fred: Worker process died unexpectedly auth: Debug: pam(fred,127.0.0.1,<osv6w6PW4tB/AAAB>): Finished passdb lookup dovecot: auth: Debug: auth(fred,127.0.0.1,<osv6w6PW4tB/AAAB>): Auth request finished auth-worker(2469): Fatal: master: service(auth-worker): child 2469 returned error 2 auth-worker(2471): Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth dovecot: auth-worker(2471): Debug: Module loaded: /usr/lib/dovecot/modules/auth/lib20_auth_var_expand_crypt.so auth-worker(2471): Debug: conn unix:auth-worker (pid=2468,uid=118): Server accepted connection (fd=13) auth-worker(2471): Debug: conn unix:auth-worker (pid=2468,uid=118): Sending version handshake auth: Debug: client passdb out: FAIL#0111#011user=fred#011code=temp_fail imap-login: Disconnected (auth service reported temporary failure): user=<fred>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured, session=<osv6w6PW4tB/AAAB> ________________________________________________________________________________ >Perhaps you also want to set >auth_debug_passwords=yes >for getting the actual password in plain text. >(Don't forget to disable that afterwards!) ________________________________________________________________________________ auth-worker: Error: fatal error: failed to reserve page summary memory auth-worker: Error: auth-worker: Error: runtime stack: auth-worker: Error: runtime.throw(0x7fc7df48b292, 0x25) auth-worker: Error: #011runtime/panic.go:1116 +0x74 fp=0x7fc7df198b30 sp=0x7fc7df198b00 pc=0x7fc7df2b9474 auth-worker: Error: runtime.(*pageAlloc).sysInit(0x7fc7df677428) auth-worker: Error: #011runtime/mpagealloc_64bit.go:80 +0x185 fp=0x7fc7df198bc0 sp=0x7fc7df198b30 pc=0x7fc7df2afb25 auth-worker: Error: runtime.(*pageAlloc).init(0x7fc7df677428, 0x7fc7df677420, 0x7fc7df691b18) auth-worker: Error: #011runtime/mpagealloc.go:317 +0x77 fp=0x7fc7df198be8 sp=0x7fc7df198bc0 pc=0x7fc7df2ad517 auth-worker: Error: runtime.(*mheap).init(0x7fc7df677420) auth-worker: Error: #011runtime/mheap.go:743 +0x24b fp=0x7fc7df198c10 sp=0x7fc7df198be8 pc=0x7fc7df2aa4cb auth-worker: Error: runtime.mallocinit() auth-worker: Error: #011runtime/malloc.go:480 +0x109 fp=0x7fc7df198c38 sp=0x7fc7df198c10 pc=0x7fc7df28fc09 auth-worker: Error: runtime.schedinit() auth-worker: Error: #011runtime/proc.go:563 +0x65 fp=0x7fc7df198c90 sp=0x7fc7df198c38 pc=0x7fc7df2bce25 auth-worker: Error: runtime.rt0_go(0x7ffc6c109f48, 0x2, 0x7ffc6c109f48, 0x7fc7df199700, 0x7fc7dfd05ea7, 0x0, 0x7fc7df199700, 0x7fc7df199700, 0x1de9f8dc88f21cc1, 0x7ffc6c1085de, ...) auth-worker: Error: #011runtime/asm_amd64.s:214 +0x129 fp=0x7fc7df198c98 sp=0x7fc7df198c90 pc=0x7fc7df2ebc09 auth: Error: auth worker: Aborted PASSV request for fred: Worker process died unexpectedly auth: Debug: pam(fred,127.0.0.1,<RFd4WqPWytB/AAAB>): Finished passdb lookup auth: Debug: auth(fred,127.0.0.1,<RFd4WqPWytB/AAAB>): Auth request finished auth-worker(2282): Fatal: master: service(auth-worker): child 2282 returned error 2 auth-worker(2284): Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth auth-worker(2284): Debug: Module loaded: /usr/lib/dovecot/modules/auth/lib20_auth_var_expand_crypt.so auth-worker(2284): Debug: conn unix:auth-worker (pid=2281,uid=118): Server accepted connection (fd=13) auth-worker(2284): Debug: conn unix:auth-worker (pid=2281,uid=118): Sending version handshake auth: Debug: client passdb out: FAIL#0111#011user=fred#011code=temp_fail imap-login: Disconnected (auth service reported temporary failure): user=<fred>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured, session=<RFd4WqPWytB/AAAB> -- David Matthews mail(a)dmatthews.org

2 1

Dovecot installation problem (libssl_iostream_openssl.so is not portable!)
by Dimitri 31 Jan '22

31 Jan '22

Hi there, i try to install dovecot from source with the following configuration: > ./configure --prefix=/test/core/dovecot --with-ssldir=/test/core/dovecot/tls the configuration runs fine with the following output at the end: > Install prefix . : /test/core/dovecot > File offsets ... : 64bit > I/O polling .... : epoll > I/O notifys .... : inotify > SSL ............ : yes (OpenSSL) > GSSAPI ......... : no > passdbs ........ : static passwd passwd-file shadow checkpassword > : -pam -bsdauth -ldap -sql > userdbs ........ : static prefetch passwd passwd-file checkpassword > : -ldap -sql > CFLAGS ......... : -std=gnu99 -g -O2 -fstack-protector-strong -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -mfunction-return=keep -mindirect-branch=keep -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast -fno-builtin-strftime -Wstrict-aliasing=2 -I/test/dep/openssl/include > SYSTEMD ........ : notify - /lib/systemd/system/dovecot.service > SQL drivers .... : > : -pgsql -mysql -sqlite -cassandra > Full text search : squat > : -lucene -solr But when i start to build (make) after a while i get the following error: > *** Warning: Linking the executable test-iostream-ssl against the loadable module > *** libssl_iostream_openssl.so is not portable! > libtool: link: gcc -std=gnu99 -g -O2 -fstack-protector-strong -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -mfunction-return=keep -mindirect-branch=keep -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast -fno-builtin-strftime -Wstrict-aliasing=2 -I/test/dep/openssl/include -o .libs/test-iostream-ssl test-iostream-ssl.o ./.libs/libssl_iostream_openssl.so ./.libs/libssl_iostream.a ../lib-test/.libs/libtest.a ../lib/.libs/liblib.a -L/test/dep/openssl/lib64 -lssl -lcrypto -ldl -Wl,-rpath -Wl,/test/core/dovecot/lib/dovecot > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `ERR_free_strings' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `ENGINE_cleanup' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_library_init' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `OBJ_cleanup' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `CRYPTO_cleanup_all_ex_data' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `OpenSSL_add_all_algorithms' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_CTX_set_tmp_rsa_callback' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `EVP_cleanup' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_load_error_strings' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_CTX_need_tmp_RSA' > collect2: error: ld returned 1 exit status > make[3]: *** [Makefile:655: test-iostream-ssl] Error 1 > make[3]: Leaving directory '/test/tmp/dovecot-2.3.17.1/src/lib-ssl-iostream' > make[2]: *** [Makefile:573: all-recursive] Error 1 > make[2]: Leaving directory '/test/tmp/dovecot-2.3.17.1/src' > make[1]: *** [Makefile:702: all-recursive] Error 1 > make[1]: Leaving directory '/test/tmp/dovecot-2.3.17.1' > make: *** [Makefile:546: all] Error 2 I've searched for the error and find some posts about set explicitly CPPFLAGS and LDFLAGS and something about missing shared libraries of openssl. My openssl have shared libraries (libcrypto.so libssl.so ...) and the explicit use of CPPFLAGS and LDFLAGS to my openssl hasn't changed anything I use Openssl 3.0 but i've tested also 1.1.1m and 1.1.1g for example, same error! Dovecot is the latest 2.3.17.1 My OS is Ubuntu 21.04 Can anyone help me with this please? Thanks!

2 1

Sync via ssh fails when ssl is active
by Johan 31 Jan '22

31 Jan '22

I have computers at two different locations and one computer running dovecot at each place. I sync my emails between these two servers using ssh and I haven't had any problems with this lately until I upgraded dovecot recently. I now get the following error at location "alfa" when trying to sync with dovecot at location "delta" Jan 20 16:13:09 doveadm: Error: doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/10-ssl.conf line 16: ssl_cert: Can't open file /etc/letsencrypt/live/delta.oxyl.net/fullchain.pem: Permission denied Jan 20 16:13:09 dsync-local(johan(a)oxyl.net)<FWBVNQN86WH52iQA1AGq6A>: Error: read(vmail(a)192.168.119.12) failed: EOF (version not received) Jan 20 16:13:09 dsync-local(johan(a)oxyl.net)<FWBVNQN86WH52iQA1AGq6A>: Error: Remote command returned error 89: ssh -q -p 22 -o StrictHostKeyChecking=no -i /datastorage/epost/vmail/.ssh/id_ecdsa -lvmail 192.168.119.12 doveadm dsync-server -ujohan(a)oxyl.net Trying to sync from "delta" i get the same error but the domain is changed in the error-message to 'alfa.oxyl.net' I can read mail at both locations using STARTTLS. There is no error in dovecot.log when I restart the service. If I disable ssl and comment out ssl_cert/ssl_key in 10-ssl.conf I have no trouble performing sync between servers. If I run the ssh-command in the error-message as user vmail I get the same ssl-error as above. Any ideas how to solve this? /Johan Pålsson

4 6

Dsync replication - delayed replication (Sync lock)
by Daniel Botting 31 Jan '22

31 Jan '22

Hi, *Our setup:* Two Debian 10 machines that are setup to replicate mail between them, we have round robin DNS setup so a user can connect to either server. *What should happen:* Mail is delivered to either server and replicated across straight away to their mailbox on the other server so it does not matter which one they are connected to they will receive it fairly soon after delivery. *What actually happens:* In some instances the user will experience a delayed receipt of messages if they are not connected to the server that the message is initially delivered to, sometimes the delay is 5/10 minutes, we had a recent support ticket submitted where it was over an hour. Error message seen in mail.err: Sep 1 10:16:15 <host name> dovecot: dsync-local(<username>)<WELSGEERTl8FEAAAZJ7A9A>: Error: Couldn't lock /path/to/mailbox/.dovecot-sync.lock: fcntl(/path/to/mailbox/.dovecot-sync.lock, write-lock, F_SETLKW) locking failed: Timed out after 30 seconds (WRITE lock held by pid 3697) Process 3697 is dovecot/doveadm-server. *Doveconf -n output:* # 2.3.10.1 (a3d0e1171): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.10 (67bf5bd7) # OS: Linux 4.19.0-10-amd64 x86_64 Debian 10.5 # Hostname: <server hostname> auth_verbose = yes default_vsz_limit = 0 doveadm_password = # hidden, use -P to show it first_valid_gid = 8 first_valid_uid = 8 last_valid_gid = 8 last_valid_uid = 8 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_gid = 8 mail_location = maildir:~/Maildir mail_plugins = " notify replication" mail_uid = 8 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex im ap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext editheader imapfla gs 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 { mail_replica = tcps:<server being replicated to>:<port being used> sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +editheader +imapflags } postmaster_address = postmaster@<domain address> protocols = " imap sieve pop3" replication_max_conns = 12 service aggregator { fifo_listener replication-notify-fifo { user = mail } unix_listener replication-notify { user = mail } } service auth { unix_listener /var/run/dovecot-exim-bridge { mode = 0660 user = Debian-exim } } service doveadm { inet_listener { port = <port being used for replication> ssl = yes } } service imap-login { inet_listener imap { port = 143 } } inet_listener imaps { port = 993 ssl = yes } process_limit = 512 process_min_avail = 4 service_count = 1 } service imap { process_limit = 1024 } service managesieve-login { inet_listener sieve { port = <sieve port> } process_min_avail = 1 service_count = 8 vsz_limit = 256 M } service managesieve { process_limit = 1024 } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0666 } } ssl = required ssl_cert = </path/to/ssl/cert/fullchain.pem ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL ssl_client_ca_dir = /etc/ssl/certs ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap override_fields = home=/var/mail/%u uid=mail gid=mail } protocol lda { mail_plugins = " notify replication sieve" } protocol imap { mail_max_userip_connections = 32 mail_plugins = " notify replication" } protocol sieve { mail_max_userip_connections = 10 managesieve_logout_format = bytes=%i/%o managesieve_max_line_length = 65536 } Kind regards Daniel

3 3

NTLM fails: dovecot: auth: Fatal: Unknown authentication mechanism 'NTLM'
by David Koski 31 Jan '22

31 Jan '22

After upgrading Debian to 11 I found Dovecot at version 2.3.13 (89f716dc2). Now auth method NTLM fails and is not even listed: # doveadm pw -l SHA1 SSHA512 SCRAM-SHA-256 BLF-CRYPT PLAIN HMAC-MD5 OTP SHA512 SHA DES-CRYPT CRYPT SSHA MD5-CRYPT PLAIN-MD4 PLAIN-MD5 SCRAM-SHA-1 SHA512-CRYPT CLEAR CLEARTEXT ARGON2I ARGON2ID SSHA256 MD5 PBKDF2 SHA256 CRAM-MD5 PLAIN-TRUNC SHA256-CRYPT SMD5 DIGEST-MD5 LDAP-MD5 /var/log/dovecot.log Jan 22 16:20:32 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:32 master: Error: service(auth): command startup failed, throttling for 2.000 secs Jan 22 16:20:34 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:34 master: Error: service(auth): command startup failed, throttling for 4.000 secs Jan 22 16:20:38 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:38 master: Error: service(auth): command startup failed, throttling for 8.000 secs Jan 22 16:20:46 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:46 master: Error: service(auth): command startup failed, throttling for 16.000 secs # doveconf -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-11-amd64 x86_64 Debian 11.2 # Hostname: imail.khmfdbyekekelj1rmytwnfh1bc.dx.internal.cloudapp.net auth_mechanisms = plain login ntlm debug_log_path = /var/log/dovecot-debug.log info_log_path = /var/log/dovecot-info.log log_path = /var/log/dovecot.log maildir_stat_dirs = yes 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 compat { alias_for = hidden = yes inbox = no list = no location = prefix = INBOX. separator = . } 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 = separator = . } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { mail_plugins = " quota trash sieve" sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = " imap sieve" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-client { mode = 0660 } } 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/letsencrypt/live/imail1.sutinen.com/fullchain.pem 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 = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = " quota trash sieve" postmaster_address = admin-kosmosisland.com(a)kosmosisland.com } protocol lda { mail_plugins = " quota trash sieve" } Regards, David Koski

3 4

LMTP error on trying to find passwd-file for Postfix recipient validation
by Narcis Garcia 28 Jan '22

28 Jan '22

Hello everyone, I have following configurations (and more) at /etc/dovecot/local.conf in a "/VirtualUserFlatFilesPostfix/" setup : [partial file content begins] protocols = imap pop3 lmtp sieve mail_location = maildir:~/data:INBOX=~/data/.INBOX service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { user = vmail group = vmail mode = 0660 } } protocol lmtp { postmaster_address = postmaster(a)example.net mail_plugins = $mail_plugins sieve } userdb { driver = passwd-file args = username_format=%u /srv/vmail/domains.d/%d/users.d/%n/etc/passwd } passdb { driver = passwd-file args = username_format=%u /srv/vmail/domains.d/%d/users.d/%n/etc/shadow.%Ls } service auth { unix_listener /var/spool/postfix/private/auth { user = postfix group = postfix mode = 0660 } } [/partial file content ends] Everyting works (IMAP mail is stored, IMAP/POP3 mail is retrieved, incoming SMTP mail from Postfix is delivered, Outgoing SMTP senders are authenticated from Postfix~SASL) BUT: When incoming mail goes to a mailbox that does not exist, an error is logged by Dovecot, letter remains at Postfix queue, and no rejection message to sender (here host is /mail.example.net/): [partial]$ cat /var/log/mail.log 2022-01-28T08:52:00.851751+01:00 correo postfix/smtpd[1853]: CFDA63A174B: client=mail.example.com[1.2.3.4] 2022-01-28T08:52:00.872248+01:00 correo postfix/cleanup[1881]: CFDA63A174B: message-id=<83c79ee1-6e2e-4e15-307e-17cdc7e2b814(a)example.com> 2022-01-28T08:52:00.884100+01:00 correo postfix/qmgr[1529]: CFDA63A174B: from=<johndoe(a)example.com>, size=854, nrcpt=1 (queue active) 2022-01-28T08:52:00.884507+01:00 correo postfix/smtpd[1853]: disconnect from mail.example.com[1.2.3.4] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7 2022-01-28T08:52:00.969275+01:00 correo postfix/lmtp[1882]: CFDA63A174B: to=<wronguser(a)example.net>, relay=mail.example.net[private/dovecot-lmtp], delay=0.43, delays=0.35/0.02/0.02/0.05, dsn=4.3.0, status=deferred (host mail.example.net[private/dovecot-lmtp] said: 451 4.3.0 <wronguser(a)example.net> Temporary internal error (in reply to RCPT TO command)) [partial]$ cat /var/log/dovecot.log 2022-01-28 08:52:00 lmtp(1883): Info: Connect from local 2022-01-28 08:52:00 auth: Error: passwd-file(wronguser(a)example.net): stat(/srv/vmail/domains.d/example.net/users.d/wronguser/etc/passwd) failed: Address family not supported by protocol 2022-01-28 08:52:00 lmtp(wronguser(a)example.net)<1883><xbrsNqCg82FbBwAAzZSvjA>: Error: user wronguser(a)example.net: Auth USER lookup failed 2022-01-28 08:52:00 lmtp(1883): Error: Failed to lookup user wronguser(a)example.net: Internal error occurred. Refer to server log for more information. 2022-01-28 08:52:00 lmtp(1883): Info: Disconnect from local: Client has quit the connection (state=READY) Thank you for any help in debugging configuration or suggestion to enhance Postfix/Dovecot parameters. Postfix 3.4 Dovecot 2.3 -- Narcis Garcia __________ I'm using this dedicated address because personal addresses aren't masked enough at this mail public archive. Public archive administrator should fix this against automated addresses collectors.

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Non-unique Message ID in mail messages
by Daniel Ryšlink 28 Jan '22

28 Jan '22

Hello! I apologize for bringing perhaps trivial/well-known matter, but I am interested in your opinion. RFC 5322 clearly states that mail messages SHOULD contain a Message ID identifier, but if the do contain it, it MUST be globally unique. Despite this requirement, I have encountered senders (namely Spamcop) that sends obviously different (albeit related) messages called "Alert" and "Summary" (they are always related to the same incident and have the same Message ID). This creates all sorts of problems when processing these mails, namely with users that have local forwards from one domain to another (our mailserver hosts multiple domains), because for example Dovecot refuses to forward the second message, flagging it as a duplicate. My question to you is - did you also encounter similar incorrect (according to RFC standards) problem, and if so, is there a way to persuade dovecot to perhaps determine the uniqueness of a message by other means than just checking the message ID (i.e. look at other identifiers, Subject, perhaps)? Because according to the log records, Spamcop does not seem to be the only offender. Thanks in advance for any reactions, and if I did something wrong by writing this message, I apologize again in advance. If required, I can provide samples of the Spamcop messages. -- --===============-- --== Best Regards! ==-- --===============-- Daniel Ryšlink Sysadmin @ Quantcom.cz Czech Republic

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