diff --git a/backup/backup.sh b/backup/backup.sh
index 98707fe..8d77bb3 100755
--- a/backup/backup.sh
+++ b/backup/backup.sh
@@ -83,7 +83,7 @@ cleanup() {
         else
             printf "%s[%s] -- [INFO] 503 error page removed --%s\n" \
                 "$cyan" "$(stamp)" "$norm" >> "$logFile"
-        fi        
+        fi
     fi
     # cleanup SQL dump directory if created
     if [ "$sqlDumpDirCreated" -eq 1 ]; then
@@ -419,6 +419,7 @@ fi
 
 
 ### read mailcow.conf and set vars as needed
+# shellcheck source=./mailcow.conf.shellcheck
 . "$mcConfig"
 export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 export COMPOSE_HTTP_TIMEOUT="$dockerStartTimeout"
@@ -454,10 +455,12 @@ printf "%s[%s] -- [INFO] Using MAILCRYPT volume: %s --%s\n" \
 case "${configDetails}" in
     /*)
         # absolute path, no need to rewrite variable
+        # shellcheck source=./backup.details
         . "${configDetails}"
         ;;
     *)
         # relative path, prepend './' to create absolute path
+        # shellcheck source=./backup.details
         . "./${configDetails}"
         ;;
 esac
@@ -794,4 +797,4 @@ exit 0
 # 130: null configuration variable in details file
 # 131: invalid configuration variable in details file
 # 138: borg exited with a critical error
-# 139: borg prune exited with a critical error
\ No newline at end of file
+# 139: borg prune exited with a critical error
diff --git a/backup/mailcow.conf.shellcheck b/backup/mailcow.conf.shellcheck
new file mode 100644
index 0000000..c599969
--- /dev/null
+++ b/backup/mailcow.conf.shellcheck
@@ -0,0 +1,66 @@
+#
+# sample mailcow configuration file
+# (used by shellcheck)
+#
+
+MAILCOW_HOSTNAME=mail.example.com
+
+DBNAME=mailcow
+DBUSER=mailcow
+DBPASS=verylongpassword
+DBROOT=anotherlongpassword
+
+HTTP_PORT=8080
+HTTP_BIND=127.0.0.1
+HTTPS_PORT=8443
+HTTPS_BIND=127.0.0.1
+
+SMTP_PORT=25
+SMTPS_PORT=465
+SUBMISSION_PORT=587
+IMAP_PORT=143
+IMAPS_PORT=993
+POP_PORT=110
+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
+
+TZ=America/Edmonton
+
+COMPOSE_PROJECT_NAME=mailcowdockerized
+
+ACL_ANYONE=disallow
+MAILDIR_GC_TIME=1440
+ADDITIONAL_SAN=
+SKIP_LETS_ENCRYPT=y
+ENABLE_SSL_SNI=n
+SKIP_IP_CHECK=n
+SKIP_HTTP_VERIFICATION=n
+SKIP_CLAMD=n
+SKIP_SOGO=n
+SKIP_SOLR=n
+SOLR_HEAP=1024
+USE_WATCHDOG=y
+ALLOW_ADMIN_EMAIL_LOGIN=n
+WATCHDOG_NOTIFY_EMAIL=a@example.com,b@example.com,c@example.com
+WATCHDOG_NOTIFY_BAN=y
+WATCHDOG_EXTERNAL_CHECKS=y
+LOG_LINES=9999
+
+IPV4_NETWORK=172.22.1
+IPV6_NETWORK=fd4d:6169:6c63:6f77::/64
+#SNAT_TO_SOURCE=
+#SNAT6_TO_SOURCE=
+
+#API_KEY=
+#API_KEY_READ_ONLY=
+#API_ALLOW_FROM=172.22.1.1,127.0.0.1
+
+MAILDIR_SUB=Maildir
+SOGO_EXPIRE_SESSION=480
+DOVECOT_MASTER_USER=
+DOVECOT_MASTER_PASS=
+MAILCOW_PASS_SCHEME=BLF-CRYPT