These are useful for email events, and possibly some custom messages.

Every item in the user's user.xml file can be referenced with a "{user_<tag-name>}". This is the first area it attempts to match with variables that start with "{user_".

{all}  (a raw dump of the item's info.)
{the_file_path}
{the_file_name}
{the_file_size} and {size} 
{size_formatted} human friendly version of {size}
{the_file_error}
{the_file_start}
{the_file_end}
{url}
{display}
{user_time}
{path1}  (piece #1 of the file's path)
{path2}  (piece #2)
{path3}  (piece #3, etc.)
{path4}
{path5}

Next it searches the user properties in memory about the current session:

User session properties in memory:

	{user_id}
	{user_number}
	{user_listen_ip_port}
	{user_listen_ip}
	{user_port}
	{user_ip}
	{user_protocol}
	{user_name}
	{user_email}
	{user_current_password}
	{user_the_command}
	{user_the_command_data}
	{user_current_dir}  <--has the root VFS item on the dir path.
	{user_dir}  <--does not have the root VFS item on the dir path.
	{user_dir}
	{user_logged_in}
	{user_log}
	{user_failed_commands}
	{user_session_commands}
	{user_refresh_user}
	{user_stat}
	
	{user_dieing}
	{user_pasv_connect}
	{user_last_logged_command}
	{user_session_uploads}
	{user_session_downloads}
	
	{user_session_download_count}
	{user_session_upload_count}
	{user_macbinary_enabled}
	{user_list_zip_dir}
	{user_list_zip_file}
	{user_list_zip_only}
	{user_list_zip_app}
	{user_list_dot}
	{user_zlibLevel}
	
	{user_last_file_real_path}
	{user_last_file_name}
	{user_login_date_stamp}
	{user_login_date}
	{user_login_date_formatted}
	{user_termination_message}
	{user_file_transfer_mode}
	{user_modez}
	{user_dataSecure}
	{user_secureType}
	{user_friendly_quit}
	
	{user_last_port_string}
	{user_last_time_remaining}
	{user_last_action}
	{user_sfv}
	{user_pause_now}
	
	{user_new_pass1}
	{user_new_pass2}
	
	{user_PASV_port}
	{user_sending_file}
	{user_receiving_file}
	{user_listing_files}
	{user_pasv_guessing}
	{user_do_normal_list}
	{user_dont_write}
	{user_dont_read}
	{user_dont_log}
	{user_didDisconnect}
	{user_adminAllowed}
	{user_sscn_mode}
	
	{user_file_length}
	{user_current_loc}
	{user_start_transfer_time}
	{user_end_part_transfer_time}
	{user_overall_transfer_speed}
	{user_current_transfer_speed}
	{user_seconds_remaining}
	{user_start_transfer_byte_amount}
	{user_bytes_sent}
	{user_bytes_received}
	{user_ratio_bytes_sent}
	{user_ratio_bytes_received}
	{user_start_resume_loc}
	
	
	{user_secure}
	{user_explicit_ssl}
	{user_explicit_tls}
	{user_require_encryption}
	{user_login_date_stamp}
	{user_login_date}
	{user_login_date_formatted}

	{user_password}
	{user_current_dir}
	{user_sessionid}
	{user_site_commands_text}
	{user_time_remaining}
	{user_paused}
	{user_bytes_remaining}
	{user_pasv_port}
	{user_ratio}
	{user_perm_ratio}
	
	when using LDAP integration
	{user_ldap_<ldap_key_name>} like {user_ldap_mail}, {user_ldap_sAMAccountName} , etc.

Overall server items:

	{beep}
	{server_time_date}
	{login_number}
	{users_connected}
	{last_login_date_time}
	{last_login_ip}
	{last_login_user}
	{failed_logins}
	{successful_logins}
	{total_logins}
	{downloaded_files}
	{uploaded_files}
	{bytes_received_f}
	{bytes_sent_f}
	{total_bytes_f}
	{max_server_download_speed}
	{max_server_upload_speed}
	{bytes_received}
	{bytes_sent}
	{total_bytes}
	{current_server_downloading_count}
	{current_server_uploading_count}
	{current_download_speed}
	{current_upload_speed}
	{max_users}
	{ip}
	{beep_connect}
	{deny_reserved_ports}
	{deny_fxp}
	{about_info_str}
	{version_info}
	{start_time}
	{thread_count}
	{free_memory}