mail.sh

#!/bin/bash
#author: salman sk

LOGS_DIR="logs"
LOG_FILE="$LOGS_DIR/mail.log"
CONFIG_FILE="config.conf"
MAIL_LOG="/var/log/exim/mainlog"
SPAM_DIR="/var/spool/exim/db/spam"
PHISHING_DIR="/var/spool/exim/db/phishing"  # Customize this path if needed

if [ "$EUID" -ne 0 ]; then
  echo "Please run as root"
  exit 1
fi

if [ ! -f "$config_file" ]; then
  echo "Config file not found. Exiting."
  exit 1
fi

source "$config_file"

mkdir -p "$LOGS_DIR"

log_message() {
    local message="$1"
    echo "$(date +"%Y-%m-%d %H:%M:%S") - $message" | tee -a "$LOG_FILE"
}

load_config() {
    if [[ -f "$CONFIG_FILE" ]]; then
        log_message "Loading configuration from $CONFIG_FILE"
        source "$CONFIG_FILE"
    else
        log_message "Configuration file $CONFIG_FILE not found. Using defaults."
    fi
}

clear_mail_queue() {
    log_message "Clearing the mail queue..."
    exim -bp | awk '{print $3}' | xargs -I {} exim -Mrm {} >> "$LOG_FILE" 2>&1
    log_message "Mail queue cleared."
}

clear_spam_emails() {
    log_message "Clearing spam emails..."
    if [[ -d "$SPAM_DIR" ]]; then
        rm -rf "$SPAM_DIR"/*
        log_message "Spam emails cleared from $SPAM_DIR."
    else
        log_message "Spam directory $SPAM_DIR not found. Skipping spam clearance."
    fi

    if [[ -d "$PHISHING_DIR" ]]; then
        rm -rf "$PHISHING_DIR"/*
        log_message "Phishing emails cleared from $PHISHING_DIR."
    else
        log_message "Phishing directory $PHISHING_DIR not found. Skipping phishing clearance."
    fi
}

optimize_mail_system() {
    log_message "Optimizing the mail system..."
    # Reload Exim configuration to apply any changes
    exim -qff >> "$LOG_FILE" 2>&1
    log_message "Mail system optimized and reloaded."
}

check_mail_logs() {
    log_message "Checking mail logs statistics..."
    local timestamp=$(date +"%Y%m%d_%H%M%S")
    local log_file="$LOGS_DIR/mail_logs_$timestamp.log"

    : > "$log_file"
    
    log_message "Saving mail log stats to $log_file"

    echo "---- Mail Log Statistics ----" >> "$log_file"
    echo "Date: $(date)" >> "$log_file"
    echo >> "$log_file"

    echo "1. Total messages processed:" >> "$log_file"
    grep "==> " "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "2. Messages delivered:" >> "$log_file"
    grep "completed" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "3. Messages rejected:" >> "$log_file"
    grep "rejected" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "4. Messages bounced:" >> "$log_file"
    grep "bounced" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "5. Messages deferred:" >> "$log_file"
    grep "deferred" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "6. Authentication failures:" >> "$log_file"
    grep "auth" "$MAIL_LOG" | grep "failed" | wc -l >> "$log_file"
    
    echo "7. Spam detected:" >> "$log_file"
    grep "Spam:" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "8. Phishing attempts:" >> "$log_file"
    grep "Phishing:" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "9. Messages with unknown recipients:" >> "$log_file"
    grep "unknown" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo "10. Messages with invalid addresses:" >> "$log_file"
    grep "invalid" "$MAIL_LOG" | wc -l >> "$log_file"
    
    echo >> "$log_file"
    echo "---- End of Statistics ----" >> "$log_file"

    log_message "Mail log stats saved to $log_file."
}

log_message "Starting mail system management script..."

load_config

clear_mail_queue

clear_spam_emails

optimize_mail_system

check_mail_logs

log_message "Mail system management completed."

exit 0