# Apple II Email and Usenet News Suite
[Back to Main emai//er Docs](README-emailler.md#detailed-documentation-for-email-functions) ## `REBUILD.SYSTEM` `REBUILD.SYSTEM` is a utility for converting a folder of email messages (text files named `EMAIL.nnn` where `nnn` is an integer) into a mailbox. It will erase any existing `EMAIL.DB` and `NEXT.EMAIL` files, parse the message files and create new `EMAIL.DB` and `NEXT.EMAIL` files. This tool may be used for bulk import of messages or for recreating the `EMAIL.DB` file for a mailbox which has become corrupted. `REBUILD.SYSTEM` simply prompts for the path of the directory to process. If you use this tool for bulk import, be sure that all the `EMAIL.nnn` files are in Apple II text format with carriage return (CR) line endings (not MS-DOS (CRLF) or UNIX style (LF).) [Back to Main emai//er Docs](README-emailler.md#detailed-documentation-for-email-functions)