diff --git a/mail/docker-compose.yml b/mail/docker-compose.yml
index 4659d1e..ea9441d 100644
--- a/mail/docker-compose.yml
+++ b/mail/docker-compose.yml
@@ -2,7 +2,7 @@
 version: '3.7'
 services:
   mail:
-    image: mailserver/docker-mailserver:9.1.0
+    image: mailserver/docker-mailserver:10.1.2
     hostname: ${HOSTNAME}
     domainname: ${DOMAINNAME}
     container_name: ${CONTAINER_NAME}
diff --git a/mail/setup.sh b/mail/setup.sh
index 6b26ef1..0cffd32 100755
--- a/mail/setup.sh
+++ b/mail/setup.sh
@@ -19,15 +19,14 @@ RESET="\e[0m"
 
 set -euEo pipefail
 trap '__log_err "${FUNCNAME[0]:-?}" "${BASH_COMMAND:-?}" "${LINENO:-?}" "${?:-?}"' ERR
-trap '_unset_vars || :' EXIT
 
 function __log_err
 {
-  printf "\n––– ${BOLD}${RED}UNCHECKED ERROR${RESET}\n%s\n%s\n%s\n%s\n\n" \
-    "  – script    = ${SCRIPT:-${0}}" \
-    "  – function  = ${1} / ${2}" \
-    "  – line      = ${3}" \
-    "  – exit code = ${4}" >&2
+  printf "\n--- ${BOLD}${RED}UNCHECKED ERROR${RESET}\n%s\n%s\n%s\n%s\n\n" \
+    "  - script    = ${SCRIPT:-${0}}" \
+    "  - function  = ${1} / ${2}" \
+    "  - line      = ${3}" \
+    "  - exit code = ${4}" >&2
 
   printf "Make sure you use a version of this script that matches
 the version / tag of docker-mailserver. Please read the
@@ -35,39 +34,38 @@ the version / tag of docker-mailserver. Please read the
 ly and use ./setup.sh help and read the VERSION section.\n" >&2
 }
 
-function _unset_vars
-{
-  unset CDIR CRI INFO IMAGE_NAME CONTAINER_NAME DEFAULT_CONFIG_PATH
-  unset USE_CONTAINER WISHED_CONFIG_PATH CONFIG_PATH VOLUME USE_TTY
-  unset SCRIPT USING_SELINUX
-}
-
-function _get_current_directory
+function _get_absolute_script_directory
 {
+  if [[ "$(uname)" == "Darwin" ]]
+  then
+    readlink() {
+      greadlink "${@:+$@}" # Requires coreutils
+    }
+  fi
   if dirname "$(readlink -f "${0}")" &>/dev/null
   then
-    CDIR="$(dirname "$(readlink -f "${0}")")"
+    DIR="$(dirname "$(readlink -f "${0}")")"
   elif realpath -e -L "${0}" &>/dev/null
   then
-    CDIR="$(realpath -e -L "${0}")"
-    CDIR="${CDIR%/setup.sh}"
+    DIR="$(realpath -e -L "${0}")"
+    DIR="${DIR%/setup.sh}"
   fi
 }
 
-CDIR="$(pwd)"
-_get_current_directory
+DIR="$(pwd)"
+_get_absolute_script_directory
 
 CRI=
-INFO=
-IMAGE_NAME=
-CONTAINER_NAME=
-DEFAULT_CONFIG_PATH="${CDIR}/config"
-USE_CONTAINER=false
-WISHED_CONFIG_PATH=
 CONFIG_PATH=
-VOLUME=
+CONTAINER_NAME=
+DEFAULT_CONFIG_PATH="${DIR}/config"
+IMAGE_NAME=
+INFO=
+USE_CONTAINER=false
 USE_TTY=
-USING_SELINUX=
+USE_SELINUX=
+VOLUME=
+WISHED_CONFIG_PATH=
 
 function _check_root
 {
@@ -158,7 +156,7 @@ ${ORANGE}OPTIONS${RESET}
 
         -p PATH
             Provides the config folder path. The default is
-            ${WHITE}${CDIR}/config/${RESET}
+            ${WHITE}${DIR}/config/${RESET}
 
     ${LBLUE}SELinux${RESET}
         -z
@@ -171,36 +169,35 @@ ${ORANGE}OPTIONS${RESET}
 
 ${RED}[${ORANGE}SUB${RED}]${ORANGE}COMMANDS${RESET}
     ${LBLUE}COMMAND${RESET} email ${RED}:=${RESET}
-        ${0} email add <EMAIL ADDRESS> [<PASSWORD>]
-        ${0} email update <EMAIL ADDRESS> [<PASSWORD>]
-        ${0} email del [ OPTIONS${RED}...${RESET} ] <EMAIL ADDRESS> [ <EMAIL ADDRESS>${RED}...${RESET} ]
-        ${0} email restrict <add${RED}|${RESET}del${RED}|${RESET}list> <send${RED}|${RESET}receive> [<EMAIL ADDRESS>]
-        ${0} email list
+        ${0} email ${CYAN}add${RESET} <EMAIL ADDRESS> [<PASSWORD>]
+        ${0} email ${CYAN}update${RESET} <EMAIL ADDRESS> [<PASSWORD>]
+        ${0} email ${CYAN}del${RESET} [ OPTIONS${RED}...${RESET} ] <EMAIL ADDRESS> [ <EMAIL ADDRESS>${RED}...${RESET} ]
+        ${0} email ${CYAN}restrict${RESET} <add${RED}|${RESET}del${RED}|${RESET}list> <send${RED}|${RESET}receive> [<EMAIL ADDRESS>]
+        ${0} email ${CYAN}list${RESET}
 
     ${LBLUE}COMMAND${RESET} alias ${RED}:=${RESET}
-        ${0} alias add <EMAIL ADDRESS> <RECIPIENT>
-        ${0} alias del <EMAIL ADDRESS> <RECIPIENT>
-        ${0} alias list
+        ${0} alias ${CYAN}add${RESET} <EMAIL ADDRESS> <RECIPIENT>
+        ${0} alias ${CYAN}del${RESET} <EMAIL ADDRESS> <RECIPIENT>
+        ${0} alias ${CYAN}list${RESET}
 
     ${LBLUE}COMMAND${RESET} quota ${RED}:=${RESET}
-        ${0} quota set <EMAIL ADDRESS> [<QUOTA>]
-        ${0} quota del <EMAIL ADDRESS>
+        ${0} quota ${CYAN}set${RESET} <EMAIL ADDRESS> [<QUOTA>]
+        ${0} quota ${CYAN}del${RESET} <EMAIL ADDRESS>
 
     ${LBLUE}COMMAND${RESET} config ${RED}:=${RESET}
-        ${0} config dkim [ ARGUMENTS${RED}...${RESET} ]
-        ${0} config ssl <FQDN> (${CYAN}ATTENTION${RESET}: This is deprecated and will be removed soon.)
+        ${0} config ${CYAN}dkim${RESET} [ ARGUMENTS${RED}...${RESET} ]
 
     ${LBLUE}COMMAND${RESET} relay ${RED}:=${RESET}
-        ${0} relay add-domain <DOMAIN> <HOST> [<PORT>]
-        ${0} relay add-auth <DOMAIN> <USERNAME> [<PASSWORD>]
-        ${0} relay exclude-domain <DOMAIN>
+        ${0} relay ${CYAN}add-domain${RESET} <DOMAIN> <HOST> [<PORT>]
+        ${0} relay ${CYAN}add-auth${RESET} <DOMAIN> <USERNAME> [<PASSWORD>]
+        ${0} relay ${CYAN}exclude-domain${RESET} <DOMAIN>
 
     ${LBLUE}COMMAND${RESET} debug ${RED}:=${RESET}
-        ${0} debug fetchmail
-        ${0} debug fail2ban [unban <IP>]
-        ${0} debug show-mail-logs
-        ${0} debug inspect
-        ${0} debug login <COMMANDS>
+        ${0} debug ${CYAN}fetchmail${RESET}
+        ${0} debug ${CYAN}fail2ban${RESET} [unban <IP>]
+        ${0} debug ${CYAN}show-mail-logs${RESET}
+        ${0} debug ${CYAN}inspect${RESET}
+        ${0} debug ${CYAN}login${RESET} <COMMANDS>
 
 ${ORANGE}EXAMPLES${RESET}
     ${WHITE}./setup.sh email add test@domain.tld${RESET}
@@ -234,7 +231,7 @@ function _docker_image
   if ${USE_CONTAINER}
   then
     # reuse existing container specified on command line
-    ${CRI} exec "${USE_TTY}" "${CONTAINER_NAME}" "${@}"
+    ${CRI} exec "${USE_TTY}" "${CONTAINER_NAME}" "${@:+$@}"
   else
     # start temporary container with specified image
     if ! _docker_image_exists "${IMAGE_NAME}"
@@ -244,8 +241,8 @@ function _docker_image
     fi
 
     ${CRI} run --rm \
-      -v "${CONFIG_PATH}:/tmp/docker-mailserver${USING_SELINUX}" \
-      "${USE_TTY}" "${IMAGE_NAME}" "${@}"
+      -v "${CONFIG_PATH}:/tmp/docker-mailserver${USE_SELINUX}" \
+      "${USE_TTY}" "${IMAGE_NAME}" "${@:+$@}"
   fi
 }
 
@@ -253,7 +250,7 @@ function _docker_container
 {
   if [[ -n ${CONTAINER_NAME} ]]
   then
-    ${CRI} exec "${USE_TTY}" "${CONTAINER_NAME}" "${@}"
+    ${CRI} exec "${USE_TTY}" "${CONTAINER_NAME}" "${@:+$@}"
   else
     echo "The mailserver is not running!"
     exit 1
@@ -300,8 +297,8 @@ function _main
   do
     case ${OPT} in
       i ) IMAGE_NAME="${OPTARG}" ;;
-      z ) USING_SELINUX=":z"     ;;
-      Z ) USING_SELINUX=":Z"     ;;
+      z ) USE_SELINUX=":z"     ;;
+      Z ) USE_SELINUX=":Z"     ;;
       c )
         # container specified, connect to running instance
         CONTAINER_NAME="${OPTARG}"
@@ -311,7 +308,7 @@ function _main
       p )
         case "${OPTARG}" in
           /* ) WISHED_CONFIG_PATH="${OPTARG}"         ;;
-          *  ) WISHED_CONFIG_PATH="${CDIR}/${OPTARG}" ;;
+          *  ) WISHED_CONFIG_PATH="${DIR}/${OPTARG}" ;;
         esac
 
         if [[ ! -d ${WISHED_CONFIG_PATH} ]]
@@ -349,11 +346,11 @@ function _main
 
     email )
       case ${2:-} in
-        add      ) shift 2 ; _docker_image addmailuser "${@}" ;;
-        update   ) shift 2 ; _docker_image updatemailuser "${@}" ;;
-        del      ) shift 2 ; _docker_container delmailuser "${@}" ;;
-        restrict ) shift 2 ; _docker_container restrict-access "${@}" ;;
-        list     ) _docker_image listmailuser ;;
+        add      ) shift 2 ; _docker_image addmailuser "${@:+$@}" ;;
+        update   ) shift 2 ; _docker_image updatemailuser "${@:+$@}" ;;
+        del      ) shift 2 ; _docker_container delmailuser "${@:+$@}" ;;
+        restrict ) shift 2 ; _docker_container restrict-access "${@:+$@}" ;;
+        list     ) _docker_container listmailuser ;;
         *        ) _usage ;;
       esac
       ;;
@@ -369,25 +366,24 @@ function _main
 
     quota )
       case ${2:-} in
-        set      ) shift 2 ; _docker_image setquota "${@}" ;;
-        del      ) shift 2 ; _docker_image delquota "${@}" ;;
+        set      ) shift 2 ; _docker_image setquota "${@:+$@}" ;;
+        del      ) shift 2 ; _docker_image delquota "${@:+$@}" ;;
         *        ) _usage ;;
       esac
       ;;
 
     config )
       case ${2:-} in
-        dkim     ) shift 2 ; _docker_image open-dkim "${@}" ;;
-        ssl      ) shift 2 ; _docker_image generate-ssl-certificate "${1}" ;;
+        dkim     ) shift 2 ; _docker_image open-dkim "${@:+$@}" ;;
         *        ) _usage ;;
       esac
       ;;
 
     relay )
       case ${2:-} in
-        add-domain     ) shift 2 ; _docker_image addrelayhost "${@}" ;;
-        add-auth       ) shift 2 ; _docker_image addsaslpassword "${@}" ;;
-        exclude-domain ) shift 2 ; _docker_image excluderelaydomain "${@}" ;;
+        add-domain     ) shift 2 ; _docker_image addrelayhost "${@:+$@}" ;;
+        add-auth       ) shift 2 ; _docker_image addsaslpassword "${@:+$@}" ;;
+        exclude-domain ) shift 2 ; _docker_image excluderelaydomain "${@:+$@}" ;;
         *              ) _usage ;;
       esac
       ;;
@@ -395,7 +391,7 @@ function _main
     debug )
       case ${2:-} in
         fetchmail      ) _docker_image debug-fetchmail ;;
-        fail2ban       ) shift 2 ; _docker_container fail2ban "${@}" ;;
+        fail2ban       ) shift 2 ; _docker_container fail2ban "${@:+$@}" ;;
         show-mail-logs ) _docker_container cat /var/log/mail/mail.log ;;
         inspect        ) _inspect ;;
         login          )
@@ -404,7 +400,7 @@ function _main
           then
             _docker_container /bin/bash
           else
-            _docker_container /bin/bash -c "${@}"
+            _docker_container /bin/bash -c "${@:+$@}"
           fi
           ;;
         * ) _usage ; exit 1 ;;
@@ -416,4 +412,4 @@ function _main
   esac
 }
 
-_main "${@}"
+_main "${@:+$@}"