first commit

2025-05-18 17:54:25 +02:00
commit fcda9808ee
3 changed files with 145 additions and 0 deletions
--- a/mailserver_backup.sh
+++ b/mailserver_backup.sh
@ -0,0 +1,111 @@
+#!/bin/bash
+# Coded by Mike Peters <mike@skylake.me>
+#
+# Backup useable with docker-mailserver: https://github.com/tomav/docker-mailserver
+#
+# NOTE: This script need to be executed as root!
+#       If you change the backup user name the Backup should be readable for him.
+#       Every single detail is saved in the LOGFILE.
+#       It may happen that you receive errors in the mail-stats backup section, this is normal because tar can't access socket files.
+#       The Backup will delete Backup older than 3 days, this can be change in the specified section.
+#       !!! Pay attention that no third party should get your backup !!!
+#
+# TODO: Log error messages.
+#       Encrypt Backup with public GPG key.
+#
+# Security Issues:
+# * The EMails of every user are in the backup accessible, so the backup user can see every email.
+#   A possibility to prevent that is that the backup would be encrypted with a Public Key.
+# * Also the script needs to executed by root which is not a good idea, but only root has access to the mailboxes.
+# * The encrypted passwords and the usernames will be backedup.
+#
+# I hope this can help somebody!
+#
+TIMESTAMP="$(date +'%Y-%m-%d')"                               # DATETIME like: 2019-09-08
+BACKUP_DIR="/tmp/backup"                                      # Folder where the Backup should be saved
+LOGFILE="$BACKUP_DIR/"backup_log.txt                          # Logfile containing every detail
+SRCDIR="/home/user/mail/mail/"                                # Location of docker-mailserver
+BACKUP_USER="backup"                                          # Backup user, the backup is after execution available for him.
+
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] automatic mail backup started" >> "$LOGFILE"
+
+# Creating backup folder and tmp folder
+mkdir -p $BACKUP_DIR
+mkdir -p $BACKUP_DIR/tmp
+
+# Naigating to Source Directory
+cd $SRCDIR
+
+# Backup Mailboxes
+for domain in *;
+do
+  cd $SRCDIR
+
+  # Search for domains
+  if [ -d "$domain" ]; then
+     echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] folder for domain $domain found" >> "$LOGFILE"
+     cd $domain/
+  else
+    continue
+  fi
+
+  # Search for users in the domain
+  for mailbox in *;
+  do
+    cd $SRCDIR/$domain/
+    if [ -d "$mailbox" ]; then
+      echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] folder for mailbox $mailbox found" >> "$LOGFILE"
+      EMAIL="$mailbox"@"$domain"
+      FILENAME="$TIMESTAMP"_mailbox_backup_"$EMAIL".tar.gz
+      cd $mailbox/
+    else
+      continue
+    fi
+
+    # Backup Mails
+    echo Create backup for user "$EMAIL".
+    echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] mail backup for $EMAIL started" >> "$LOGFILE"
+    tar -cpzf $BACKUP_DIR/tmp/$FILENAME .
+    echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] mail backup for $EMAIL finished" >> "$LOGFILE"
+  done
+done
+
+# Creating Config Backup
+cd $SRCDIR/../config/
+FILENAME="$TIMESTAMP"_mail_config_backup.tar.gz
+echo Create backup of config directory
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] config backup started" >> "$LOGFILE"
+tar -cpzf $BACKUP_DIR/tmp/$FILENAME .
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] config backup finished" >> "$LOGFILE"
+
+# Creating Config Backup
+cd $SRCDIR/../mail-state/
+FILENAME="$TIMESTAMP"_mail_stats_backup.tar.gz
+echo Create backup of mail stats directory
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] mail-stats backup started" >> "$LOGFILE"
+tar -cpzf $BACKUP_DIR/tmp/$FILENAME .
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] mail-stats backup finished" >> "$LOGFILE"
+
+
+# Creating Archive of Backups
+cd $BACKUP_DIR/tmp/
+FILENAME="$TIMESTAMP"_mail_backup.tar.gz
+echo Packing everything in a single archive
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] creating backup archive" >> "$LOGFILE"
+tar -cpzf $BACKUP_DIR/$FILENAME .
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] creation of backup archive has been finished" >> "$LOGFILE"
+
+# Delete entries older than 3 days: mtime always 3-1 so in this case +2
+# SOURCE: https://unix.stackexchange.com/questions/92346/why-does-find-mtime-1-only-return-files-older-than-2-days
+cd $BACKUP_DIR
+find "$BACKUP_DIR" -name '*mail_backup*' -type f -mtime +7 -exec rm -f {} \;
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] old files deleted" >> "$LOGFILE"
+
+
+# Remove tmp directory
+rm -rf $BACKUP_DIR/tmp
+
+# Set Correct File Permissions
+chown -R $BACKUP_USER:$BACKUP_USER "$BACKUP_DIR"
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] file permission changed" >> "$LOGFILE"
+echo $(date +'%d-%m-%Y %H:%M:%S') "[MAIL] operation finished" >> "$LOGFILE"