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BUG: service(auth) crash when quota-status lookup an address with local-part starting with auth_master_user_separator
by Marco Giunta 29 Sep '15

29 Sep '15

Hi, I'm using dovecot 2.2.15 (configuration attached below), and I 've enabled quota-status; when I try to look up the quota status of an address with the local-part starting with the same character as 'auth_master_user_separator', dovecot/auth crash: My 'auth_master_user_separator' is '*' # telnet localhost 25001 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. request=smtpd_access_policy sender=johndoe(a)example.com recipient=*(a)example.com size=100000000 action=DEFER_IF_PERMIT Internal error occurred. Refer to server log for more information. request=smtpd_access_policy sender=johndoe(a)example.com recipient=*janedoe(a)example.com size=100000000 action=DEFER_IF_PERMIT Internal error occurred. Refer to server log for more information. request=smtpd_access_policy sender=johndoe(a)example.com recipient=;(a)example.com size=100000000 action=DUNNO request=smtpd_access_policy sender=johndoe(a)example.com recipient=;janedoe(a)example.com size=100000000 and in server log: Sep 29 08:51:05 my_server dovecot: master: Dovecot v2.2.15 starting up for imap, pop3, lmtp, sieve (core dumps disabled) Sep 29 08:51:05 my_server dovecot: master: Warning: /mnt is no longer mounted. See http://wiki2.dovecot.org/Mountpoints Sep 29 08:51:41 my_server dovecot: auth: Panic: file auth-request.c: line 1252 (auth_request_set_login_username): assertion failed: (*username != '\0') Sep 29 08:51:41 my_server dovecot: auth: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a7126a] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a712d6] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a70cac] -> dovecot/auth [0x4131eb] -> dovecot/auth(auth_request_set_username+0x94) [0x413284] -> dovecot/auth [0x40dc4c] -> dovecot/auth [0x40e60b] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x49) [0x3d70a82699] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xd5) [0x3d70a83a55] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x3d70a82739] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x3d70a829b8] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x3d70a29233] -> dovecot/auth(main+0x383) [0x41cfc3] -> /lib64/libc.so.6(__libc_start_main+0xf4) [0x3302e1d9f4] -> dovecot/auth [0x40b5f9] Sep 29 08:51:41 my_server dovecot: quota-status: Error: userdb lookup(*(a)example.com): Disconnected unexpectedly Sep 29 08:51:41 my_server dovecot: auth: Fatal: master: service(auth): child 2147 killed with signal 6 (core dumps disabled) Sep 29 10:02:02 my_server dovecot: auth: Fatal: master: service(auth): child 12592 killed with signal 6 (core dumps disabled) Sep 29 10:03:52 my_server dovecot: auth: Panic: file auth-request.c: line 1252 (auth_request_set_login_username): assertion failed: (*username != '\0') Sep 29 10:03:52 my_server dovecot: auth: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a7126a] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a712d6] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a70cac] -> dovecot/auth [0x4131eb] -> dovecot/auth(auth_request_set_username+0x94) [0x413284] -> dovecot/auth [0x40dc4c] -> dovecot/auth [0x40e60b] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x49) [0x3d70a82699] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xd5) [0x3d70a83a55] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x3d70a82739] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x3d70a829b8] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x3d70a29233] -> dovecot/auth(main+0x383) [0x41cfc3] -> /lib64/libc.so.6(__libc_start_main+0xf4) [0x3302e1d9f4] -> dovecot/auth [0x40b5f9] Sep 29 10:03:52 my_server dovecot: quota-status: Error: userdb lookup(*janedoe(a)example.com): Disconnected unexpectedly Sep 29 10:03:52 my_server dovecot: auth: Fatal: master: service(auth): child 9945 killed with signal 6 (core dumps disabled) Sep 29 10:16:10 my_server dovecot: auth: userdb(?): Username character disallowed by auth_username_chars: 0x3b (username: ;(a)example.com) Sep 29 10:16:43 my_server dovecot: auth: userdb(?): Username character disallowed by auth_username_chars: 0x3b (username: ;janedoe(a)example.com) If I change my 'auth_master_user_separator' to an other character, for example ';' : # telnet localhost 25001 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. request=smtpd_access_policy sender=johndoe(a)example.com recipient=*(a)example.com size=100000000 action=DUNNO request=smtpd_access_policy sender=johndoe(a)example.com recipient=*janedoe(a)example.com size=100000000 action=DUNNO request=smtpd_access_policy sender=johndoe(a)example.com recipient=;(a)example.com size=100000000 action=DEFER_IF_PERMIT Internal error occurred. Refer to server log for more information. request=smtpd_access_policy sender=johndoe(a)example.com recipient=;janedoe(a)example.com size=100000000 action=DEFER_IF_PERMIT Internal error occurred. Refer to server log for more information. and server log: Sep 29 10:20:00 my_server dovecot: auth: userdb(?): Username character disallowed by auth_username_chars: 0x2a (username: *(a)example.com) Sep 29 10:20:31 my_server dovecot: auth: userdb(?): Username character disallowed by auth_username_chars: 0x2a (username: *janedoe(a)example.com) Sep 29 10:20:54 my_server dovecot: auth: Panic: file auth-request.c: line 1252 (auth_request_set_login_username): assertion failed: (*username != '\0') Sep 29 10:20:54 my_server dovecot: auth: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a7126a] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a712d6] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a70cac] -> dovecot/auth [0x4131eb] -> dovecot/auth(auth_request_set_username+0x94) [0x413284] -> dovecot/auth [0x40dc4c] -> dovecot/auth [0x40e60b] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x49) [0x3d70a82699] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xd5) [0x3d70a83a55] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x3d70a82739] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x3d70a829b8] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x3d70a29233] -> dovecot/auth(main+0x383) [0x41cfc3] -> /lib64/libc.so.6(__libc_start_main+0xf4) [0x3302e1d9f4] -> dovecot/auth [0x40b5f9] Sep 29 10:20:54 my_server dovecot: quota-status: Error: userdb lookup(;(a)example.com): Disconnected unexpectedly Sep 29 10:20:54 my_server dovecot: auth: Fatal: master: service(auth): child 19941 killed with signal 6 (core dumps disabled) Sep 29 10:21:15 my_server dovecot: auth: Panic: file auth-request.c: line 1252 (auth_request_set_login_username): assertion failed: (*username != '\0') Sep 29 10:21:15 my_server dovecot: auth: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a7126a] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a712d6] -> /usr/lib64/dovecot/libdovecot.so.0 [0x3d70a70cac] -> dovecot/auth [0x4131eb] -> dovecot/auth(auth_request_set_username+0x94) [0x413284] -> dovecot/auth [0x40dc4c] -> dovecot/auth [0x40e60b] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x49) [0x3d70a82699] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xd5) [0x3d70a83a55] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x3d70a82739] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x3d70a829b8] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x3d70a29233] -> dovecot/auth(main+0x383) [0x41cfc3] -> /lib64/libc.so.6(__libc_start_main+0xf4) [0x3302e1d9f4] -> dovecot/auth [0x40b5f9] Sep 29 10:21:15 my_server dovecot: quota-status: Error: userdb lookup(;janedoe(a)example.com): Disconnected unexpectedly Sep 29 10:21:15 my_server dovecot: auth: Fatal: master: service(auth): child 20758 killed with signal 6 (core dumps disabled) of course, I don't have any address '*(a)example.com' or '*janedoe(a)example.com', but some bot in internet try to send emails to these addresses, and my Postfix ask my dovecot server for the quota of '*' or '*janedoe' user. I've solved the problem adding a REJECT rule to Postfix to discard the mail to '*(a)example.com' before the quota check, but this problem should be solved in Dovecot. thank you, Marco My configuration: # 2.2.15: /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.6 (3e924b1b6c5c+) # OS: Linux 2.6.18-406.el5 x86_64 Red Hat Enterprise Linux Server release 5.11 (Tikanga) ext3 auth_master_user_separator = * auth_mechanisms = plain login auth_verbose = yes auth_verbose_passwords = sha1 disable_plaintext_auth = no doveadm_password = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX doveadm_port = 12345 first_valid_uid = 200 hostname = myserver.example.com imap_client_workarounds = delay-newmail lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes lda_original_recipient_header = X-Original-To listen = * login_log_format_elements = user=<%u> PID=%p method=%m rip=%r lip=%l %c login_trusted_networks = XXX.XXX.XXX.XXX mail_gid = mail mail_home = /var/spool/mail/%1n/%n mail_location = maildir:/var/spool/mail/%1n/%n:INDEX=/var/shared/indexes/%1n/%n mail_plugins = acl mailbox_alias quota mail_shared_explicit_inbox = yes mail_uid = vmail maildir_very_dirty_syncs = 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 ihave duplicate vacation-seconds imapflags notify mbox_write_locks = fcntl mmap_disable = yes namespace archives { hidden = no inbox = no list = children location = maildir:/var/spool/archives/%1n/%n:INDEX=/var/shared/indexes/%1n/%n/archives mailbox 2015 { auto = subscribe special_use = \Archive } prefix = Archives. separator = . subscriptions = no type = private } namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = . } namespace others { list = children location = maildir:/var/spool/mail/%%1n/%%n:INDEXPVT=/var/shared/indexes/%1n/%n/shared/%%n prefix = Other Users.%%n. separator = . subscriptions = no type = shared } namespace others_archives { list = children location = maildir:/var/spool/archives/%%1n/%%n:INDEXPVT=/var/shared/indexes/%1n/%n/shared/%%n/archives prefix = Other Users Archives.%%n. separator = . subscriptions = no type = shared } passdb { args = /etc/dovecot/passwd.masterusers driver = passwd-file master = yes pass = yes } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { acl = vfile:/etc/dovecot/global-acls:cache_secs=300 acl_shared_dict = file:/var/shared/dovecot/shared-mailboxes.dict fts = solr fts_autoindex = yes fts_autoindex_max_recent_msgs = 20 fts_solr = url=http://solr.localdomain:8080/solr/ mailbox_alias_new = INBOX_spam mailbox_alias_old = Junk quota = maildir:User quota:ns= quota2 = maildir:Archive quota:ns=Archives. quota2_rule = *:storage=20GB quota2_warning = storage=95%% quota2-warning 95 %u quota2_warning2 = storage=90%% quota2-warning 90 %u quota2_warning3 = storage=80%% quota2-warning 80 %u quota_rule = *:storage=5GB quota_rule2 = Trash:storage=+20%% quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Quota exceeded (mailbox for user is full) quota_status_success = DUNNO quota_warning = storage=100%% quota-warning 100 %u quota_warning2 = storage=95%% quota-warning 95 %u quota_warning3 = storage=90%% quota-warning 90 %u quota_warning4 = storage=80%% quota-warning 80 %u sieve = file:~/sieve;active=~/sieve/.dovecot.sieve sieve_default = /etc/dovecot/sieve/dovecot.sieve sieve_extensions = +notify +imapflags +vacation-seconds sieve_max_redirects = 16 sieve_vacation_min_period = 0s } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh postmaster_address = postmaster(a)example.com protocols = imap pop3 lmtp sieve rejection_reason = Your message to <%t> was automatically rejected for the following reason - il tuo messaggio a <%t> è stato rifiutato per il seguente motivo:%n%n%r rejection_subject = Rejected - Messaggio rifiutato: %s service auth { inet_listener { port = 49494 } unix_listener auth-userdb { user = vmail } } service dict { unix_listener dict { user = vmail } } service doveadm { inet_listener { port = 26001 } } service imap-login { process_min_avail = 16 service_count = 0 } service imap { process_limit = 2048 } service lmtp { inet_listener lmtp { port = 24 } process_min_avail = 5 } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } process_min_avail = 16 service_count = 0 vsz_limit = 256 M } service quota-status { client_limit = 1 executable = /usr/libexec/dovecot/quota-status -p postfix inet_listener { port = 25001 } } service quota-warning { executable = script /usr/local/bin/dovecot-quota-warning.sh unix_listener quota-warning { user = vmail } user = vmail } service quota2-warning { executable = script /usr/local/bin/dovecot-quota2-warning.sh unix_listener quota2-warning { user = vmail } user = vmail } ssl_cert = </etc/pki/dovecot/certs/myserver-crt.pem ssl_key = </etc/pki/dovecot/private/myserver-key.pem ssl_protocols = !SSLv2 !SSLv3 submission_host = smtp.example.com:25 syslog_facility = local2 userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } protocol lmtp { mail_plugins = acl mailbox_alias quota sieve postmaster_address = postmaster(a)example.com } protocol lda { info_log_path = log_path = mail_plugins = acl mailbox_alias quota sieve syslog_facility = local2 } protocol imap { mail_max_userip_connections = 50 mail_plugins = acl mailbox_alias quota imap_quota imap_acl } protocol sieve { mail_max_userip_connections = 50 } protocol pop3 { mail_max_userip_connections = 50 } -- ----------------------------------- |Marco Giunta - SISSA Computer Staff| |Via Bonomea, 265 | |34136 - Trieste, Italy | |Tel: +39-40-3787-503 | |Fax: +39-040-3787-244 | |e-mail: giunta(a)sissa.it | -----------------------------------

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My website feedback
by Muzaffer Tolga Ozses 29 Sep '15

29 Sep '15

Hi, I gave a feedback about dovecot.fi website yesterday. It's awaiting moderation because it exceeded message size because it contains a screenshot. Was this ML the right place to post this? If not, please redirect me to the appropriate place. Regards,

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Newbie why is dovecot classified diff then sendmail or courier
by David Niklas 29 Sep '15

29 Sep '15

Hello, this is probably a dumb question, but I can't for the life of me figure out why sendmail and courier are classified universally as network-mail-mta whereas dovecot is in places like network-mail-general or some such place. I've used several Linux distros and have noted this keenly (they also normally classify photorec, the HD recovery tool as hardware-photography,so this may just be a mistake). I'm concerned that I'm looking into the wrong software for an mail transport/delivery agent. Thanks, David

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doveadm fetch line wrapping
by Peter Chiochetti 28 Sep '15

28 Sep '15

The manual at http://wiki2.dovecot.org/Tools/Doveadm/Deduplicate tells how to estimate what will be expunged: > doveadm -f table fetch -u jane 'guid uid' mailbox a_Box | sort I wanted to learn the subjects: > doveadm -f table fetch -u jane 'guid hdr.Subject' mailbox a_Box In the output, long lines will be broken up, continuation lines starting with a blank (mostly), disabling the sort > doveadm -f table fetch -u jane 'guid hdr.Subject' mailbox a_Box \ > | sed -e :a -e '$!N;s/\n\s//;ta' -e 'P;D' | sort --stable Some (gnu) sed foo joins them back together, the sort works again :) -- peter

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Error saving to IMAP folder
by Peter Thomassen 28 Sep '15

28 Sep '15

Hi, I have been using dovecot for multiple years, without a problem so far. I'm running version 2.0.19-0ubuntu2.2. A few weeks ago, the following problem started. When sending an e-mail with Thunderbird, the message is saved to the "Sent" IMAP folder after sending it out. Every few days, this

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Problem with SHA2/Geotrust and dovecot 2.0.9
by Il Neofita 28 Sep '15

28 Sep '15

Hi I have renew my geotrust certificate using sha2, and I have problem with Dovecot 2.0.9 and redhat 6.7. The same certificate is working in Apache. The error is dovecot: imap-login: Fatal: Can't load ssl_cert: There is no valid PEM certificate. and the configuration file is ssl_cert=</etc/pki/dovecot/certs/2015/new.2015.pem ssl_key =</etc/pki/dovecot/private/new.2015.key ssl_ca = </etc/pki/dovecot/certs/2015/new-intermediate.crt What I should do?

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Sieve and forward
by Il Neofita 28 Sep '15

28 Sep '15

Hi I have already posted to the postfix group, however, I believe that sieve and dovecot should be able to fix this problem. When I receive a message from yahoo and the user forward it to a gmail or yahoo acount this email is considered as spam or rejected. >From yahoo is rejected since it seems that I am try to send spam since the email should be signed with dkim. Is there a way to encpuslated or sign in some way. Thank you

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dovecot, fts, solr5 patch, fuzzy search
by Sergey Urushkin 28 Sep '15

28 Sep '15

Hi! I have a patch and several thoughts about FTS in dovecot. I. SOLR v5.1 and above doesn't allow GET /select queries with Content-Type header set, so, I just removed it from the code: --- dovecot-2.2.18/src/plugins/fts-solr/solr-connection.c 2015-05-13 17:14:45.000000000 +0300 +++ dovecot-2.2.18.patch/src/plugins/fts-solr/solr-connection.c 2015-09-27 19:47:40.363843359 +0300 @@ -432,7 +432,6 @@ solr_connection_select_response, conn); http_client_request_set_port(http_req, conn->http_port); http_client_request_set_ssl(http_req, conn->http_ssl); - http_client_request_add_header(http_req, "Content-Type", "text/xml"); http_client_request_submit(http_req); conn->request_status = 0; After that it works just fine. And it seems it doesn't hurt compatibility with older versions. Tested with 3.1, 3.6.2, 4.10.4, 5.3.1 So, I think this patch should be included. II. Fuzzy search. As I understand dovecot searches the same way despite FUZZY word is given or not. In my case I'd like to have an ability to make lookups like "domain.com usernamepart" (usernamepart - part of localpart). So, I use '<str name="defType">edismax</str><int name="qs">15</int>' inside requestHandler /select in solrconfig.xml. It's very convenient for users. Besides other things, this makes searches "abc@def" and "def@abc" identical to dovecot. But the problem is that sometimes the exact match is necessary. E.g. when using "doveadm expunge". For now I found a workaround - remove fts plugins while using doveadm with -o "`dovecot -n | sed -n 's/"//; s/ *= */=/; /^mail_plugins/s/$"\| fts\(\|_[^ ]\+$\)//gp'`". But I think users should have an ability to decide which search type to use. Here is what I'm suggesting: 1. Implement fts_fuzzy_default option (default - true, current behavior). false should disable fuzzy search by default. 2. Make a way for fts backend to choose which search type to use. For solr it would be an ability to specify: a) "handler" (default=select) and "handler_fuzzy" (default=select or handler's value) (the same as handler by default). After this you have to create second select-like handler with fuzzy capabilities in solrconfig.xml. Example: fts_solr = url=http://127.0.0.1:8983/solr/dovecot/ handler=select handler_fuzzy=select2 This method will use the same index for both search types. b) "url_fuzzy" URL (different solr core or even address/port), like this: fts_solr = url=http://127.0.0.1:8983/solr/dovecot/ url_fuzzy=http://127.0.0.1:8983/solr/dovecot_fuzzy/ This method will allow to have two completely different indexes. And according to RFC 6203 search query generally may be mixed (FUZZY/EXACT). Both options will be useful in different setups. Hope, these thoughts will help. -- Best regards, Sergey Urushkin

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v2.2.19 release candidate released
by Greg Wildman 28 Sep '15

28 Sep '15

Hello, I am trying out 2.2.19.rc1 on a lightly loaded server with no problems so far. The reason I wanted to try 2.2.19.rc1 was to get access to the %{listener} variable in the auth phase so I can modify the SQL password_query according to which unix_listener is being queried. According to the docs, "These variables work only in Dovecot-auth and login_log_format_elements setting". I can confirm that %{listener} works in login_log_format_elements but it does not work if I use it in my SQL auth query. My logic is as follows: I create multiple listeners for different SASL authentications in 10 -master.conf service auth { unix_listener auth-userdb { mode = 0660 user = dovecot group = vmail } unix_listener exim-client { mode = 0660 user = dovecot group = exim } unix_listener xmpp-client { mode = 0660 user = dovecot group = mail } user = $default_internal_user } Now I want to use %{listener} in my SQL password_query in a case statement to auth according to which listener is being used. E.g. CASE '%{listener} ' \ WHEN 'exim-client' THEN ma.SMTPAUTH_allowed = 'YES' \ WHEN 'xmpp-client' THEN ma.XMPP_allowed = 'YES' \ ELSE ma.IMAP_allowed = 'YES' \ END Should the %{listener} variable work in this case ? -- Greg

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modify message with doveadm?
by Frank-Ulrich Sommer 27 Sep '15

27 Sep '15

Hello, I'm using dovecot with getmail and spamassassin. To re-learn false detected mails I created two folders and use an external script that checks the corresponding maildir directories for changes (with inotifywait). The mails found in these directories are passed to sa-learn (to re-learn the correct classification) and then moved back to the inbox or the spam folder. To access the mail I use "doveadm search" (to find all mails in the two folders), "doveadm fetch" (to get the text and pass it to sa-learn) and "doveadm move" (to move the mail to the correct location. This works as desired, except that a mail once marked as spam will forever be marked as such. Spamassassin has the -d option to remove the markup, but I need to replace the original mail with the cleaned version. The only idea I got was deleting that mail and importing the cleaned one, but as I want to implement several "special" folders for further functionality with different IMAP clients I would prefer a "cleaner" solution. What would be the correct/best way to modify the mail body/header/text from an external tool? Kind regards, Frank

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