#!/bin/bash
USER='username'
PASS='password'
HOST='ftp.mydomain.com'
LOCAL_BACKUP_DIR='/backups'
REMOTE_DIR='/backupfiles'

lftp -u $USER,$PASS $HOST <<EOF
set ftp:ssl-protect-data true
set ftp:ssl-force true
set ssl:verify-certificate no
mirror -R -e "$LOCAL_BACKUP_DIR" "$REMOTE_DIR"
quit
EOF