mailcow importer bash script for migrations from older versions.

 

When coming from older versions of mailcow which are problematic to update via update.sh you can use this workaround to import all emails to a new mailcos-installation:  

• install the newest mailcow version: https://docs.mailcow.email/de/i_u_m/i_u_m_install/
• recreate all domains and users manualy or via create-domain-mailbox.sh
• rsync only the maildir from old installation:

 

rsync -aHhP --numeric-ids --delete /var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data/ root@host:/var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data

 

• use the importer.sh script to import all emails to the corresponding email-address directly in the dovecot-container:

 

#!/bin/bash

# Define the parent path of the Maildir
MAILDIR_PARENT="/var/vmail"

# Get all users from doveadm
USERS=$(doveadm user '*')

# Loop through each user
for FULL_USER in $USERS; do
    # Extract domain and username
    DOMAIN=$(echo "$FULL_USER" | cut -d@ -f2)
    USER=$(echo "$FULL_USER" | cut -d@ -f1)

    # Construct the path to the user's Maildir
    USER_MAILDIR="${MAILDIR_PARENT}/${DOMAIN}/${USER}"

    # Check if the Maildir exists
    if [ -d "$USER_MAILDIR" ]; then
        echo "Processing $USER_MAILDIR"

        # Insert your command to import mails from the user's Maildir
        # For example, using doveadm import (adjust as necessary):
        doveadm import -u $FULL_USER maildir:$USER_MAILDIR "" all

        # Replace the above line with your actual command for importing mails.
    else
        echo "Maildir not found for $FULL_USER"
    fi
done

 

Update: 15.01.2024

 

• added script to create domains and mailboxes from maildir: create-domain-mailbox.sh   Please pay attention to change the variables to suit your environment.  

#!/bin/bash

# Mailcow API details
API_KEY="your-mailcow-api-key"
MAILCOW_URL="https://your-mailcow-url/api/v1"

# Path to the vmail directory
VMAIL_DIR="/var/vmail"

# Function to create a domain in Mailcow
create_domain() {
    local domain=$1
    curl -s -X POST "${MAILCOW_URL}/add/domain" \
         -H "Content-Type: application/json" \
         -H "X-API-Key: ${API_KEY}" \
         --data-raw "{\"domain\":\"${domain}\"}"
}

# Function to create a mailbox in Mailcow
create_mailbox() {
    local domain=$1
    local user=$2
    local password="defaultPassword" # Set a default or generate a password
    curl -s -X POST "${MAILCOW_URL}/add/mailbox" \
         -H "Content-Type: application/json" \
         -H "X-API-Key: ${API_KEY}" \
         --data-raw "{\"local_part\":\"${user}\",\"domain\":\"${domain}\",\"password\":\"${password}\"}"
}

# Read domains and mailboxes from the vmail directory
for domain_dir in "${VMAIL_DIR}"/*; do
    if [ -d "${domain_dir}" ]; then
        domain=$(basename "${domain_dir}")
        echo "Creating domain: ${domain}"
        create_domain "${domain}"

        for user_dir in "${domain_dir}"/*; do
            if [ -d "${user_dir}" ]; then
                user=$(basename "${user_dir}")
                echo "Creating mailbox: ${user}@${domain}"
                create_mailbox "${domain}" "${user}"
            fi
        done
    fi
done