This script creates a new email user, sets up their Maildir structure, assigns them to the appropriate groups, and prompts for a password, ensuring the user is configured for email services.

create_email_user.sh

#!/bin/bash

# Function to display usage
usage() {
    echo "Usage: $0"
    echo "This script creates a new email user and sets up the necessary directories and groups."
}

# Check if the script is run as root
if [ "$EUID" -ne 0 ]; then
    echo "Please run as root or use sudo."
    exit 1
fi

# Prompt for the new email username
read -p "Enter the new email username (without domain, e.g., 'support'): " username

# Check if the username is empty
if [ -z "$username" ]; then
    echo "Username cannot be empty."
    exit 1
fi

# Create the user
useradd -m -s /bin/bash "$username"

# Set a password for the user
passwd "$username"

# Create the Maildir structure
mkdir -p /home/"$username"/Maildir/{cur,new,tmp}
chown -R "$username":"$username" /home/"$username"/Maildir
chmod -R 700 /home/"$username"/Maildir

# Add user to mail and dovecot groups
if ! getent group mail > /dev/null; then
    groupadd mail
fi

if ! getent group dovecot > /dev/null; then
    groupadd dovecot
fi

usermod -aG mail,dovecot "$username"

# Output the user's email address
echo "User  created successfully!"
echo "Email address: [email protected]"