Multi-Column Support

The program is designed to handle extremely large files in the shortest possible time. Therefore, to avoid spending extra time analyzing the processed data, many functions include the "Multi-Column Support" setting, which allows the user to explicitly specify that the processed list contains multiple columns. By default, this setting is disabled, which means the text file is assumed to contain only one column (email addresses).

If multi-column support is enabled and no explicit column is specified for sorting ("Sort By Column"), sorting is performed by the first column. If sorting by domain ("Sort By Domain") is enabled, it is assumed that the first column contains an email address, where the domain part comes after the @ symbol.