Sieve generate a lot of hard link copies of mails in mailboxes

Hello,

I have very strange issue. Sieve generate copies of users messages i.e. not real copies but hardlinks for the same message. It happens to many messages but not every message and not every time, it is not a single user issue I have couple users with that issue.

It happens during auto reporting for spam/ham with sieve. But I'm unable to reproduce it.

At some point the hardlinks copies become so many that the mailbox index files become so bug that dovecot start throwing error: ################################ dovecot[3385911]: imap(redacted@domain.tld)<1992901><RRBL9PQX69IXfCSs>: Error: Mailbox Junk: mmap(size=520636784) failed with file /var/lib/dovecot-virtualmin/index/redacted@domain.tld/.Junk/dovecot.index.cache: Cannot allocate memory ################################ other relevant logs are:

dovecot: imap-login: Login: user=, method=PLAIN, rip=YYY.YYY.YYY.YYY, lip=XXX.XXX.XXX.XXX, mpid=3393763, TLS, session=<c1Z1lPsZuPCAWqqI> dovecot: imap(redacted.user)<3393763><c1Z1lPsZuPCAWqqI>: sieve: DEBUG: learn-spam.sieve was triggered on imap.cause=COPY: msgid=87584056G78841203D85243127W62181551P@idomziqnd dovecot: imap(redacted.user)<3393763><c1Z1lPsZuPCAWqqI>: sieve: DEBUG: learn-spam on imap.cause=COPY: from=redacted.mail, to=redacted2.mail, subject=Asseyez-vous confortablement, n'importe où..., msgid=87584056G78841203D85243127W62181551P@idomziqnd, X-Spamd-Result=default: False [4.49 / 15.00]; FORGED_RECIPIENTS(2.00)[m:redacted2.mail,s:redacted.user.fr]; BAYES_SPAM(1.89)[88.30%]; MID_RHS_NOT_FQDN(0.50)[]; BAD_REP_POLICIES(0.10)[]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[multipart/related,multipart/alternative,text/plain]; ASN(0.00)[asn:34300, ipnet:62.173.128.0/19, country:RU]; RCVD_COUNT_ONE(0.00)[1]; MIME_TRACE(0.00)[0:+,1:+,2:+,3:~,4:~,5:+]; RCPT_COUNT_ONE(0.00)[1]; MISSING_XM_UA(0.00)[]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; GREYLIST(0.00)[pass,body]; R_DKIM_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(0.00)[+mx]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[or.mg]; NEURAL_SPAM(0.00)[0.000] dovecot: imap(redacted.user)<3393763><c1Z1lPsZuPCAWqqI>: sieve: DEBUG: learn-spam send to rspamd spam dovecot: imap(redacted.user)<3393763><c1Z1lPsZuPCAWqqI>: program exec:/var/lib/dovecot/sieve/rspamd-learn-spam.sh (3397238): Terminated with non-zero exit code 1 dovecot: imap(redacted.user)<3393763><c1Z1lPsZuPCAWqqI>: Error: sieve: failed to execute to program `rspamd-learn-spam.sh': refer to server log for more information. [2024-06-03 07:36:40] dovecot: imap(redacted.user)<3393763><c1Z1lPsZuPCAWqqI>: Disconnected: Connection closed (UID FETCH finished 32.173 secs ago) in=2914 out=39237 deleted=1 expunged=1 trashed=0 hdr_count=14 hdr_bytes=10705 body_count=1 body_bytes=1606

I know that this is because the mail which is reported is too big for curl but documentation say that $$$$$$$$$$$$$$$$$ pipe :copy :try "rspamd-learn-spam.sh"; $$$$$$$$$$$$$$$$$ this should ignore the error. I have tested also to change it like that: $$$$$$$$$$$$$$$$$ pipe :copy "rspamd-learn-spam.sh"; $$$$$$$$$$$$$$$$$ but the issue still persists

I can't confirm that the issue is that error because these errors are way less than the messages with hardlink copies. Also sometimes one mail have more than two hardlinks to it. ######################################## here is a example:

inode# hardlink_count filename 2430090371 23850 ./Maildir/.Trash/cur/1714190559.M355157P25776.redacted.hostname,S=39259,W=40217:2,S 2430090371 23850 ./Maildir/.Trash/cur/1714190562.M259778P25902.redacted.hostname,S=39259,W=40217:2,S 2430090371 23850 ./Maildir/.Trash/cur/1714190565.M188090P26028.redacted.hostname,S=39259,W=40217:2,S 2430090371 23850 ./Maildir/.Trash/cur/1714190568.M340582P26179.redacted.hostname,S=39259,W=40217:2,S

yes this is "23850" hardlinks to the same Inode ####################################### The issue is somewhere in the sieve ham/spam reporting to rspamd but cant figure out where and why.

Is this a bug or my configuration is wrong?

Here are all related configurations (feel free to ask for more if needed): ###################################################################### # doveconf -n # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.16 (09c29328) # OS: Linux 4.18.0-513.24.1.el8_9.x86_64 x86_64 Rocky Linux release 8.9 (Green Obsidian) # Hostname: redacteddomain.tld auth_mechanisms = plain login disable_plaintext_auth = no first_valid_uid = 1000 mail_location = maildir:~/Maildir:INDEX=/var/lib/dovecot-virtualmin/index/%u:CONTROL=/var/lib/dovecot-virtualmin/control/%u 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 vacation-seconds imapsieve vnd.dovecot.imapsieve mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = create special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } mailbox spam { auto = subscribe special_use = \Junk } prefix = } passdb { driver = pam } plugin { imapsieve_mailbox1_before = file:/var/lib/dovecot/sieve/learn-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = spam imapsieve_mailbox2_before = file:/var/lib/dovecot/sieve/learn-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = spam imapsieve_mailbox2_name = * imapsieve_mailbox3_before = file:/var/lib/dovecot/sieve/learn-spam.sieve imapsieve_mailbox3_causes = COPY imapsieve_mailbox3_name = Junk imapsieve_mailbox4_before = file:/var/lib/dovecot/sieve/learn-ham.sieve imapsieve_mailbox4_causes = COPY imapsieve_mailbox4_from = Junk imapsieve_mailbox4_name = * quota = fs:user userquota quota2 = fs:group groupquota quota_grace = 100M quota_warning = storage=95%% quota-warning 95 %n %d quota_warning2 = storage=90%% quota-warning 90 %n %d quota_warning3 = storage=80%% quota-warning 80 %n %d sieve = file:~/sieve;active=~/.dovecot.sieve sieve_before = /var/lib/dovecot/sieve/before-global.sieve sieve_extensions = +vacation-seconds sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment +vnd.dovecot.debug sieve_pipe_bin_dir = /var/lib/dovecot/sieve sieve_plugins = sieve_extprograms sieve_imapsieve sieve_vacation_default_period = 10d sieve_vacation_max_period = 30d sieve_vacation_min_period = 1h } protocols = imap pop3 lmtp sieve process_min_avail = 5 service_count = 0 } service imap { process_limit = 400 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 01224 user = postfix } } service pop3 { process_limit = 200 } service quota-warning { executable = script /var/lib/dovecot/quota-warning.sh service_count = 1 unix_listener quota-warning { group = dovecot mode = 0666 user = dovecot } } ssl_ca =

######################################################################

# cat /var/lib/dovecot/sieve/learn-spam.sieve require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "imap4flags", "vnd.dovecot.debug", "variables"];

# Logging if address :matches "from" "*" { set "FROM" "${1}"; } if address :matches "to" "*" { set "TO" "${1}"; } if header :matches "subject" "*" { set "SUBJECT" "${1}"; } if header :matches "Message-ID" "*" { set "MSGID" "${1}"; } if header :matches "X-Spamd-Result" "*" { set "XSpamdResult" "${1}"; } if environment :matches "imap.cause" "*" { set "IMAPCAUSE" "${1}"; } debug_log "learn-spam.sieve was triggered on imap.cause=${IMAPCAUSE}: msgid=${MSGID}"; set "LogMsg" "learn-spam on imap.cause=${IMAPCAUSE}: from=${FROM}, to=${TO}, subject=${SUBJECT}, msgid=${MSGID}, X-Spamd-Result=${XSpamdResult}";

# Spam-learning by sending copy with curl to rspmd if anyof (environment :is "imap.cause" "COPY", environment :is "imap.cause" "APPEND") { debug_log "${LogMsg}"; debug_log "learn-spam send to rspamd spam"; pipe :copy :try "rspamd-learn-spam.sh"; } # Catch replied or forwarded spam and send to rspamd ham elsif anyof (allof (hasflag "\\Answered", environment :contains "imap.changedflags" "\\Answered"), allof (hasflag "$Forwarded", environment :contains "imap.changedflags" "$Forwarded")) { debug_log "${LogMsg}"; debug_log "learn-spam send to rspamd ham"; pipe :copy :try "rspamd-learn-ham.sh"; } ######################################################################

cat /var/lib/dovecot/sieve/learn-ham.sieve require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables", "vnd.dovecot.debug"];

# Exclude messages which were moved to Trash (or training mailboxes) from ham learning if environment :matches "imap.mailbox" "*" { set "mailbox" "${1}"; } if string "${mailbox}" [ "INBOX/Trash", "INBOX/Deleted Items", "INBOX/Bin", "INBOX/train_ham", "INBOX/train_prob", "INBOX/train_spam", "Trash" ] { stop; }

# Logging if address :matches "from" "*" { set "FROM" "${1}"; } if address :matches "to" "*" { set "TO" "${1}"; } if header :matches "subject" "*" { set "SUBJECT" "${1}"; } if header :matches "Message-ID" "*" { set "MSGID" "${1}"; } if header :matches "X-Spamd-Result" "*" { set "XSpamdResult" "${1}"; } if environment :matches "imap.cause" "*" { set "IMAPCAUSE" "${1}"; } debug_log "learn-ham on imap.cause=${IMAPCAUSE}: from=${FROM}, to=${TO}, subject=${SUBJECT}, msgid=${MSGID}, X-Spamd-Result=${XSpamdResult}";

# Ham-learning sending a copy of the message to rspamd debug_log "learn-ham send to rspamd ham"; pipe :copy :try "rspamd-learn-ham.sh"; ######################################################################

cat /var/lib/dovecot/sieve/rspamd-learn-ham.sh #!/bin/bash

function log_error() { echo date '+%Y-%m-%d %H:%M:%S' ERROR: $1 >&2; } function log() { echo date '+%Y-%m-%d %H:%M:%S' INFO: $1; }

MAIL=$(tee) SERVER_LIST=("redacted.tld") #rspamd server

PASSWORD="redacted"

for SERVER in ${SERVER_LIST[@]}; do log "Trying to report spam to ${SERVER}" RETURN=$(/usr/bin/curl -s --connect-timeout 1 -H "Password: ${PASSWORD}" --data-binary --url "http://${SERVER}:11334/learnham" -d "${MAIL}") STATUS=$? if [ $STATUS -eq 0 ]; then log "Spam reported to ${SERVER}: ${RETURN}" exit 0 else if [ $STATUS -eq 28 ]; then log_error "Reporting SPAM to ${SERVER} failed: Connection timed out." else log_error "Reporting SPAM to ${SERVER} failed: CURL exit status ${STATUS}" fi fi done

log_error "Reporting SPAM failed ${SERVERS[@]}" exit 1 ######################################################################

cat /var/lib/dovecot/sieve/rspamd-learn-spam.sh #!/bin/bash

function log_error() { echo date '+%Y-%m-%d %H:%M:%S' ERROR: $1 >&2; } function log() { echo date '+%Y-%m-%d %H:%M:%S' INFO: $1; }

MAIL=$(tee) SERVER_LIST=("redacted.tld") #rspamd server PASSWORD="redacted"

for SERVER in ${SERVER_LIST[@]}; do log "Trying to report spam to ${SERVER}" RETURN=$(/usr/bin/curl -s --connect-timeout 1 -H "Password: ${PASSWORD}" --data-binary --url "http://${SERVER}:11334/learnspam" -d "${MAIL}") STATUS=$? if [ $STATUS -eq 0 ]; then log "Spam reported to ${SERVER}: ${RETURN}" exit 0 else if [ $STATUS -eq 28 ]; then log_error "Reporting SPAM to ${SERVER} failed: Connection timed out." else log_error "Reporting SPAM to ${SERVER} failed: CURL exit status ${STATUS}" fi fi done

log_error "Reporting SPAM failed ${SERVERS[@]}" exit 1 ######################################################################

without all "imapsieve_mailbox.* " directives the problem is gone.

Thanks to everyone in advance.

-- Warm regards George A. WPXHosting