Sync all emails from one mail server to the next (iRedMail)

migrate.sh

#!/bin/bash

set -e

function syncAccount() {
  # Important: need trailing slash
  FROM=$1
  TO=$2
  [[ $FROM =~ /$ ]] || (echo "Missing trailing slash!" && exit 1)
  [[ $TO =~ /$ ]] || (echo "Missing trailing slash!" && exit 1)
  echo -e "\033[1;33m ==> Syncing $FROM\033[0;m"
  # NOTE: Use the --delete switch for the first syncs, during dns propagation, do not use --delete anymore
# --delete \
  rsync -Pr \
   --update \
   --owner --group --chown=vmail:vmail \
   $FROM $TO
}

echo -e "\033[1;33m ==> Syncing from old mail server\033[0;m"

# NOTE: I prefer to leave the $FROM argument rather explicit here since it's pretty clear which way the data is flowing
syncAccount \
  root@old_mail:/var/vmail/vmail1/mydomain.com/username1/ \
  /var/vmail/vmail1/mydomain.com/username1/

syncAccount \
  root@old_mail:/var/vmail/vmail1/mydomain.com/username2/ \
  /var/vmail/vmail1/mydomain.com/username2/

cd /tmp # Bypass perm error on cd into /root when using "su postgres"

# Reset (webmail) quotas per: http://www.iredmail.org/forum/topic5135-iredmail-support-update-quota.html
su postgres -c "psql vmail -c 'DELETE FROM used_quota;'"

echo -e "\033[1;32m ==> All done.\033[0;m"