Merge branch 'master' into feature/fts-xapian

[XAPIAN] Added Solr Replacement [BETA]

.gitignore

@@ -13,6 +13,7 @@ data/conf/dovecot/acl_anyone
 data/conf/dovecot/dovecot-master.passwd
 data/conf/dovecot/dovecot-master.userdb
 data/conf/dovecot/extra.conf
+data/conf/dovecot/dovecot-fts-flatcurve.conf
 data/conf/dovecot/global_sieve_*
 data/conf/dovecot/last_login
 data/conf/dovecot/lua

data/Dockerfiles/dovecot/Dockerfile

@@ -1,24 +1,15 @@
-FROM debian:bullseye-slim
+FROM debian:bullseye-slim as build
 LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 
 ARG DEBIAN_FRONTEND=noninteractive
-# renovate: datasource=github-tags depName=dovecot/core versioning=semver-coerced
-ARG DOVECOT=2.3.20
-# renovate: datasource=github-releases depName=tianon/gosu versioning=semver-coerced
-ARG GOSU_VERSION=1.16
+ARG DOVECOT=2.3.19.1
+ARG FLATCURVE=v0.3.2
+ARG XAPIAN=1.4.21
 ENV LC_ALL C
 
 
 # Add groups and users before installing Dovecot to not break compatibility
-RUN groupadd -g 5000 vmail \
-  && groupadd -g 401 dovecot \
-  && groupadd -g 402 dovenull \
-  && groupadd -g 999 sogo \
-  && usermod -a -G sogo nobody \
-  && useradd -g vmail -u 5000 vmail -d /var/vmail \
-  && useradd -c "Dovecot unprivileged user" -d /dev/null -u 401 -g dovecot -s /bin/false dovecot \
-  && useradd -c "Dovecot login user" -d /dev/null -u 402 -g dovenull -s /bin/false dovenull \
-  && touch /etc/default/locale \
+RUN touch /etc/default/locale \
   && apt-get update \
   && apt-get -y --no-install-recommends install \
   apt-transport-https \
@@ -76,7 +67,13 @@ RUN groupadd -g 5000 vmail \
   libunicode-string-perl \
   liburi-perl \
   libwww-perl \
+  libstemmer-dev \
+  libexttextcat-dev \
+  libldap-dev \
+  libghc-bzlib-dev \
   lua-sql-mysql \
+  liblz4-dev \
+  libzstd-dev \
   lua-socket \
   mariadb-client \
   procps \
@@ -87,30 +84,152 @@ RUN groupadd -g 5000 vmail \
   syslog-ng-core \
   syslog-ng-mod-redis \
   wget \
+  git \
+  bison \
+  flex \
+  build-essential \
+  autoconf \
+  automake \
+  libtool \
+  make \
+  libxapian-dev \
+  default-libmysqlclient-dev \
+  libicu-dev \
+  zlib1g-dev \
+  pkg-config \
+  libsqlite3-dev \
+  liblua5.3-dev \
   && dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')" \
   && wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch" \
   && chmod +x /usr/local/bin/gosu \
-  && gosu nobody true \
-  && apt-key adv --fetch-keys https://repo.dovecot.org/DOVECOT-REPO-GPG \
-  && echo "deb https://repo.dovecot.org/ce-${DOVECOT}/debian/bullseye bullseye main" > /etc/apt/sources.list.d/dovecot.list \
-  && apt-get update \
-  && apt-get -y --no-install-recommends install \
-  dovecot-lua \
-  dovecot-managesieved \
-  dovecot-sieve \
-  dovecot-lmtpd \
-  dovecot-ldap \
-  dovecot-mysql \
-  dovecot-core \
-  dovecot-pop3d \
-  dovecot-imapd \
-  dovecot-solr \
-  && pip3 install mysql-connector-python html2text jinja2 redis \
-  && apt-get autoremove --purge -y \
-  && apt-get autoclean \
-  && rm -rf /var/lib/apt/lists/* \
-  && rm -rf /tmp/* /var/tmp/* /root/.cache/
+  && gosu nobody true
+#  && apt-key adv --fetch-keys https://repo.dovecot.org/DOVECOT-REPO-GPG \
+#  && echo "deb https://repo.dovecot.org/ce-${DOVECOT}/debian/bullseye bullseye main" > /etc/apt/sources.list.d/dovecot.list \
+#  && apt-get update \
+#  && apt-get -y --no-install-recommends install \
+#  dovecot-lua \
+#  dovecot-managesieved \
+#  dovecot-sieve \
+#  dovecot-lmtpd \
+#  dovecot-ldap \
+#  dovecot-mysql \
+#  dovecot-core \
+#  dovecot-pop3d \
+#  dovecot-imapd \
+#  dovecot-dev
 
+RUN cd /tmp && git clone --depth 1 --branch ${DOVECOT} https://github.com/dovecot/core.git dovecot/core && cd dovecot/core \
+  && ./autogen.sh \
+  && PANDOC=false ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --with-ssldir=/etc/ssl --enable-maintainer-mode --with-sql=yes --with-lua=yes --with-mysql --with-ldap --with-zstd --with-lz4 --with-ssl=openssl --with-notify=inotify --with-bzlib --with-zlib --enable-hardening --with-stemmer --with-textcat --with-icu \
+  && make -j6 \
+  && make install \
+  && make clean
+
+RUN cd /tmp && git clone --depth 1 --branch release-0.5 https://github.com/dovecot/pigeonhole dovecot/pigeonhole && cd dovecot/pigeonhole \
+  && ./autogen.sh \
+  && ./configure --with-dovecot=/usr/lib/dovecot --with-managesieve\ 
+  && make -j6 \
+  && make install \
+  && make clean
+
+RUN  cd /tmp && wget https://oligarchy.co.uk/xapian/${XAPIAN}/xapian-core-${XAPIAN}.tar.xz && tar xf xapian-core-${XAPIAN}.tar.xz && cd xapian-core-${XAPIAN} \
+  && ./configure --prefix=/usr/local/xapian \
+  && make -j6 \
+  && make install \
+  && make clean
+
+RUN cd /tmp && git clone --depth 1 --branch ${FLATCURVE} https://github.com/slusarz/dovecot-fts-flatcurve.git dovecot/flatcurve && cd dovecot/flatcurve \
+  && ./autogen.sh \
+  && ./configure --with-dovecot=/usr/lib/dovecot \
+  && make -j6 \
+  && make install \
+  && make clean
+
+FROM debian:bullseye-slim
+RUN groupadd -g 5000 vmail \
+  && groupadd -g 401 dovecot \
+  && groupadd -g 402 dovenull \
+  && groupadd -g 999 sogo \
+  && usermod -a -G sogo nobody \
+  && useradd -g vmail -u 5000 vmail -d /var/vmail \
+  && useradd -c "Dovecot unprivileged user" -d /dev/null -u 401 -g dovecot -s /bin/false dovecot \
+  && useradd -c "Dovecot login user" -d /dev/null -u 402 -g dovenull -s /bin/false dovenull \
+  && apt update && apt install lua-socket \
+  mariadb-client \
+  libstemmer-dev \
+  libexttextcat-dev \
+  libicu-dev \
+  libxapian-dev \
+  libsqlite3-dev \
+  liblua5.3-dev \
+  lua-sql-mysql \
+  libldap-dev \
+  procps \
+  python3-pip \
+  redis-server \
+  supervisor \
+  syslog-ng \
+  syslog-ng-core \
+  syslog-ng-mod-redis \
+  cpanminus \
+  curl \
+  libauthen-ntlm-perl \
+  libcgi-pm-perl \
+  libcrypt-openssl-rsa-perl \
+  libcrypt-ssleay-perl \
+  libdata-uniqid-perl \
+  libdbd-mysql-perl \
+  libdbi-perl \
+  libdigest-hmac-perl \
+  libdist-checkconflicts-perl \
+  libencode-imaputf7-perl \
+  libfile-copy-recursive-perl \
+  libfile-tail-perl \
+  libhtml-parser-perl \
+  libio-compress-perl \
+  libio-socket-inet6-perl \
+  libio-socket-ssl-perl \
+  libio-tee-perl \
+  libipc-run-perl \
+  libjson-webtoken-perl \
+  liblockfile-simple-perl \
+  libmail-imapclient-perl \
+  libmodule-implementation-perl \
+  libmodule-scandeps-perl \
+  libnet-ssleay-perl \
+  libpackage-stash-perl \
+  libpackage-stash-xs-perl \
+  libpar-packer-perl \
+  libparse-recdescent-perl \
+  libproc-processtable-perl \
+  libreadonly-perl \
+  libregexp-common-perl \
+  libsys-meminfo-perl \
+  libterm-readkey-perl \
+  libtest-deep-perl \
+  libtest-fatal-perl \
+  libtest-mock-guard-perl \
+  libtest-mockobject-perl \
+  libtest-nowarnings-perl \
+  libtest-pod-perl \
+  libtest-requires-perl \
+  libtest-simple-perl \
+  libtest-warn-perl \
+  libtry-tiny-perl \
+  libunicode-string-perl \
+  liburi-perl \
+  libwww-perl \
+  dnsutils \
+  gettext-base -y --no-install-recommends \
+  && pip3 install mysql-connector-python html2text jinja2 redis
+COPY --from=build /usr/lib/dovecot /usr/lib/dovecot
+COPY --from=build /usr/bin/doveconf /usr/bin/doveconf
+COPY --from=build /usr/bin/doveadm /usr/bin/doveadm
+COPY --from=build /usr/bin/dovecot-sysreport /usr/bin/dovecot-sysreport
+COPY --from=build /usr/sbin/dovecot /usr/sbin/dovecot
+COPY --from=build /usr/libexec/dovecot/ /usr/libexec/dovecot/
+COPY --from=build /usr/local/bin /usr/local/bin
+COPY --from=build /usr/local/xapian/ /usr/local/xapian
 COPY trim_logs.sh /usr/local/bin/trim_logs.sh
 COPY clean_q_aged.sh /usr/local/bin/clean_q_aged.sh
 COPY syslog-ng.conf /etc/syslog-ng/syslog-ng.conf

data/Dockerfiles/dovecot/docker-entrypoint.sh

@@ -109,17 +109,19 @@ EOF
 
 echo -n ${ACL_ANYONE} > /etc/dovecot/acl_anyone
 
-if [[ "${SKIP_SOLR}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
+if [[ "${SKIP_XAPIAN}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
 echo -n 'quota acl zlib mail_crypt mail_crypt_acl mail_log notify listescape replication' > /etc/dovecot/mail_plugins
 echo -n 'quota imap_quota imap_acl acl zlib imap_zlib imap_sieve mail_crypt mail_crypt_acl notify listescape replication mail_log' > /etc/dovecot/mail_plugins_imap
 echo -n 'quota sieve acl zlib mail_crypt mail_crypt_acl notify listescape replication' > /etc/dovecot/mail_plugins_lmtp
 else
-echo -n 'quota acl zlib mail_crypt mail_crypt_acl mail_log notify fts fts_solr listescape replication' > /etc/dovecot/mail_plugins
-echo -n 'quota imap_quota imap_acl acl zlib imap_zlib imap_sieve mail_crypt mail_crypt_acl notify mail_log fts fts_solr listescape replication' > /etc/dovecot/mail_plugins_imap
-echo -n 'quota sieve acl zlib mail_crypt mail_crypt_acl fts fts_solr notify listescape replication' > /etc/dovecot/mail_plugins_lmtp
+echo -n 'quota acl zlib mail_crypt mail_crypt_acl mail_log notify fts fts_flatcurve listescape replication' > /etc/dovecot/mail_plugins
+echo -n 'quota imap_quota imap_acl acl zlib imap_zlib imap_sieve mail_crypt mail_crypt_acl notify mail_log fts fts_flatcurve listescape replication' > /etc/dovecot/mail_plugins_imap
+echo -n 'quota sieve acl zlib mail_crypt mail_crypt_acl fts fts_flatcurve notify listescape replication' > /etc/dovecot/mail_plugins_lmtp
 fi
 chmod 644 /etc/dovecot/mail_plugins /etc/dovecot/mail_plugins_imap /etc/dovecot/mail_plugins_lmtp /templates/quarantine.tpl
 
+sed -i 's/vsz_limit.*/vsz_limit = '${XAPIAN_HEAP}m/g /etc/dovecot/dovecot-fts-flatcurve.conf
+
 cat <<EOF > /etc/dovecot/sql/dovecot-dict-sql-userdb.conf
 # Autogenerated by mailcow
 driver = mysql

data/conf/dovecot/dovecot-fts-flatcurve.conf

@@ -0,0 +1,23 @@
+plugin {
+  fts = flatcurve
+  fts_autoindex = yes
+
+  fts_languages = en de  
+
+  fts_tokenizers = generic email-address
+  fts_tokenizer_generic = algorithm=simple
+  # All of these are optional, and indicate the default values.
+  # They are listed here for documentation purposes; most people should
+  # not need to define/override in their config.
+  fts_flatcurve_commit_limit = 500
+  fts_flatcurve_max_term_size = 30
+  fts_flatcurve_min_term_size = 2
+  fts_flatcurve_optimize_limit = 10
+  fts_flatcurve_rotate_size = 5000
+  fts_flatcurve_rotate_time = 5000
+  fts_flatcurve_substring_search = yes
+}
+
+service indexer-worker {
+    vsz_limit = 1024m
+}

data/conf/dovecot/dovecot.conf

@@ -11,6 +11,7 @@ auth_mechanisms = plain login
 #mail_debug = yes
 #auth_debug = yes
 log_path = syslog
+log_debug = category=fts-flatcurve
 disable_plaintext_auth = yes
 # Uncomment on NFS share
 #mmap_disable = yes
@@ -189,9 +190,6 @@ plugin {
   acl_shared_dict = file:/var/vmail/shared-mailboxes.db
   acl = vfile
   acl_user = %u
-  fts = solr
-  fts_autoindex = yes
-  fts_solr = url=http://solr:8983/solr/dovecot-fts/
   quota = dict:Userquota::proxy::sqlquota
   quota_rule2 = Trash:storage=+100%%
   sieve = /var/vmail/sieve/%u.sieve
@@ -242,6 +240,7 @@ plugin {
   mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
   mail_log_fields = uid box msgid size
   mail_log_cached_only = yes
+
 }
 service quota-warning {
   executable = script /usr/local/bin/quota_notify.py
@@ -297,6 +296,7 @@ replication_dsync_parameters = -d -l 30 -U -n INBOX
 !include_try /etc/dovecot/extra.conf
 !include_try /etc/dovecot/sogo-sso.conf
 !include_try /etc/dovecot/shared_namespace.conf
+!include_try /etc/dovecot/dovecot-fts-flatcurve.conf
 # </Includes>
 default_client_limit = 10400
 default_vsz_limit = 1024 M

docker-compose.yml

@@ -154,7 +154,7 @@ services:
         - API_KEY_READ_ONLY=${API_KEY_READ_ONLY:-invalid}
         - API_ALLOW_FROM=${API_ALLOW_FROM:-invalid}
         - COMPOSE_PROJECT_NAME=${COMPOSE_PROJECT_NAME:-mailcow-dockerized}
-        - SKIP_SOLR=${SKIP_SOLR:-y}
+        - SKIP_XAPIAN=${SKIP_XAPIAN:-y}
         - SKIP_CLAMD=${SKIP_CLAMD:-n}
         - SKIP_SOGO=${SKIP_SOGO:-n}
         - ALLOW_ADMIN_EMAIL_LOGIN=${ALLOW_ADMIN_EMAIL_LOGIN:-n}
@@ -216,7 +216,7 @@ services:
             - sogo
 
     dovecot-mailcow:
-      image: mailcow/dovecot:1.22
+      image: mailcow/dovecot:1.20-xapian
       depends_on:
         - mysql-mailcow
       dns:
@@ -250,7 +250,8 @@ services:
         - ALLOW_ADMIN_EMAIL_LOGIN=${ALLOW_ADMIN_EMAIL_LOGIN:-n}
         - MAILDIR_GC_TIME=${MAILDIR_GC_TIME:-7200}
         - ACL_ANYONE=${ACL_ANYONE:-disallow}
-        - SKIP_SOLR=${SKIP_SOLR:-y}
+        - SKIP_XAPIAN=${SKIP_XAPIAN:-y}
+        - XAPIAN_HEAP=${XAPIAN_HEAP:-1024}
         - MAILDIR_SUB=${MAILDIR_SUB:-}
         - MASTER=${MASTER:-y}
         - REDIS_SLAVEOF_IP=${REDIS_SLAVEOF_IP:-}
@@ -281,7 +282,7 @@ services:
         ofelia.job-exec.dovecot_sarules.schedule: "@every 24h"
         ofelia.job-exec.dovecot_sarules.command: "/bin/bash -c \"/usr/local/bin/sa-rules.sh\""
         ofelia.job-exec.dovecot_fts.schedule: "@every 24h"
-        ofelia.job-exec.dovecot_fts.command: "/usr/bin/curl http://solr:8983/solr/dovecot-fts/update?optimize=true"
+        ofelia.job-exec.dovecot_fts.command: "doveadm fts optimize -A"
         ofelia.job-exec.dovecot_repl_health.schedule: "@every 5m"
         ofelia.job-exec.dovecot_repl_health.command: "/bin/bash -c \"/usr/local/bin/gosu vmail /usr/local/bin/repl_health.sh\""
       ulimits:
@@ -528,22 +529,6 @@ services:
           aliases:
             - dockerapi
 
-    solr-mailcow:
-      image: mailcow/solr:1.8.1
-      restart: always
-      volumes:
-        - solr-vol-1:/opt/solr/server/solr/dovecot-fts/data
-      ports:
-        - "${SOLR_PORT:-127.0.0.1:18983}:8983"
-      environment:
-        - TZ=${TZ}
-        - SOLR_HEAP=${SOLR_HEAP:-1024}
-        - SKIP_SOLR=${SKIP_SOLR:-y}
-      networks:
-        mailcow-network:
-          aliases:
-            - solr
-
     olefy-mailcow:
       image: mailcow/olefy:1.11
       restart: always
@@ -599,7 +584,6 @@ services:
         - netfilter-mailcow
         - watchdog-mailcow
         - dockerapi-mailcow
-        - solr-mailcow
       environment:
         - TZ=${TZ}
       image: robbertkl/ipv6nat
@@ -631,7 +615,6 @@ volumes:
   mysql-socket-vol-1:
   redis-vol-1:
   rspamd-vol-1:
-  solr-vol-1:
   postfix-vol-1:
   crypt-vol-1:
   sogo-web-vol-1:

generate_config.sh

@@ -122,23 +122,23 @@ else
 fi
 
 if [ ${MEM_TOTAL} -le "2097152" ]; then
-  echo "Disabling Solr on low-memory system."
-  SKIP_SOLR=y
+  echo "Disabling Xapian (full text search, build in Dovecot) on low-memory system."
+  SKIP_XAPIAN=y
 elif [ ${MEM_TOTAL} -le "3670016" ]; then
-  echo "Installed memory is <= 3.5 GiB. It is recommended to disable Solr to prevent out-of-memory situations."
-  echo "Solr is a prone to run OOM and should be monitored. The default Solr heap size is 1024 MiB and should be set in mailcow.conf according to your expected load."
-  echo "Solr can be re-enabled by setting SKIP_SOLR=n in mailcow.conf but will refuse to start with less than 2 GB total memory."
-  read -r -p  "Do you want to disable Solr now? [Y/n] " response
+  echo "Installed memory is <= 3.5 GiB. We suggest you to disable Xapian (full text search, build in Dovecot) to prevent out-of-memory situations."
+  echo "The default Xapian heap size is 1024 MiB and should be set in mailcow.conf according to your expected load."
+  echo "Xapian can be re-enabled by setting SKIP_XAPIAN=n in mailcow.conf but will refuse to start with less than 2 GB total memory."
+  read -r -p  "Do you want to disable the FTS Xapian now? [Y/n] " response
   case $response in
     [nN][oO]|[nN])
-      SKIP_SOLR=n
+      SKIP_XAPIAN=n
       ;;
     *)
-      SKIP_SOLR=y
+      SKIP_XAPIAN=y
     ;;
   esac
 else
-  SKIP_SOLR=n
+  SKIP_XAPIAN=n
 fi
 
 if [[ ${SKIP_BRANCH} != y ]]; then
@@ -243,7 +243,6 @@ POPS_PORT=995
 SIEVE_PORT=4190
 DOVEADM_PORT=127.0.0.1:19991
 SQL_PORT=127.0.0.1:13306
-SOLR_PORT=127.0.0.1:18983
 REDIS_PORT=127.0.0.1:7654
 
 # Your timezone
@@ -329,14 +328,14 @@ SKIP_CLAMD=${SKIP_CLAMD}
 
 SKIP_SOGO=n
 
-# Skip Solr on low-memory systems or if you do not want to store a readable index of your mails in solr-vol-1.
+# Skip Xapian (FTS) on low-memory systems or if you do not want to store a readable index of your mails in vmail-index-vol-1.
 
-SKIP_SOLR=${SKIP_SOLR}
+SKIP_XAPIAN=${SKIP_XAPIAN}
 
-# Solr heap size in MB, there is no recommendation, please see Solr docs.
-# Solr is a prone to run OOM and should be monitored. Unmonitored Solr setups are not recommended.
+# Xapian heap size in MB, there is no recommendation, please see Xapians docs.
+# Xapian is replacing solr completely. It is supposed to be much more efficient in CPU and RAM consumption.
 
-SOLR_HEAP=1024
+XAPIAN_HEAP=1024
 
 # Allow admins to log into SOGo as email user (without any password)
 

update.sh

@@ -388,8 +388,8 @@ CONFIG_ARRAY=(
   "MAILDIR_GC_TIME"
   "MAILDIR_SUB"
   "ACL_ANYONE"
-  "SOLR_HEAP"
-  "SKIP_SOLR"
+  "XAPIAN_HEAP"
+  "SKIP_XAPIAN"
   "ENABLE_SSL_SNI"
   "ALLOW_ADMIN_EMAIL_LOGIN"
   "SKIP_HTTP_VERIFICATION"
@@ -510,20 +510,20 @@ for option in ${CONFIG_ARRAY[@]}; do
       echo '# Otherwise a user might share data with too many other users.' >> mailcow.conf
       echo 'ACL_ANYONE=disallow' >> mailcow.conf
     fi
-  elif [[ ${option} == "SOLR_HEAP" ]]; then
+  elif [[ ${option} == "XAPIAN_HEAP" ]]; then
     if ! grep -q ${option} mailcow.conf; then
-      echo "Adding new option \"${option}\" to mailcow.conf"
-      echo '# Solr heap size, there is no recommendation, please see Solr docs.' >> mailcow.conf
-      echo '# Solr is a prone to run OOM on large systems and should be monitored. Unmonitored Solr setups are not recommended.' >> mailcow.conf
-      echo '# Solr will refuse to start with total system memory below or equal to 2 GB.' >> mailcow.conf
-      echo "SOLR_HEAP=1024" >> mailcow.conf
+      echo "Replacing SOLR_HEAP with \"${option}\" in mailcow.conf"
+      sed -i '/# Solr heap size in MB, there is no recommendation, please see Solr docs./c\# Xapian heap size in MB, there is no recommendation, please see Xapians docs.' mailcow.conf
+      sed -i '/# Solr is a prone to run OOM on large systems and should be monitored. Unmonitored Solr setups are not recommended./c\# Xapian is replacing solr completely. It is supposed to be much more efficient in CPU and RAM consumption.'  mailcow.conf
+      sed -i '/SOLR_HEAP=/c\XAPIAN_HEAP=' mailcow.conf
     fi
-  elif [[ ${option} == "SKIP_SOLR" ]]; then
+  elif [[ ${option} == "SKIP_XAPIAN" ]]; then
     if ! grep -q ${option} mailcow.conf; then
-      echo "Adding new option \"${option}\" to mailcow.conf"
-      echo '# Solr is disabled by default after upgrading from non-Solr to Solr-enabled mailcows.' >> mailcow.conf
-      echo '# Disable Solr or if you do not want to store a readable index of your mails in solr-vol-1.' >> mailcow.conf
-      echo "SKIP_SOLR=y" >> mailcow.conf
+      echo "Replacing SKIP_SOLR with \"${option}\" in mailcow.conf"
+      sed -i '/# Skip Solr on low-memory systems or if you do not want to store a readable index of your mails in solr-vol-1./c\# Skip Xapian (FTS) on low-memory systems or if you do not want to store a readable index of your mails in vmail-index-vol-1.' mailcow.conf
+      sed -i '/SKIP_SOLR=/c\SKIP_XAPIAN=' mailcow.conf
+      echo "Removing Solr-Port Binding from mailcow.conf"
+      sed -i '/SOLR_PORT=/d' mailcow.conf
     fi
   elif [[ ${option} == "ENABLE_SSL_SNI" ]]; then
     if ! grep -q ${option} mailcow.conf; then