About the Program

Opt-In List Manager is a mailing list management program. It allows you to sort, merge, and filter lists, verify the validity of email addresses, and much more. A key feature of this program is its ability to process extremely large files (several GB in size), as well as its high operating speed.

A mailing list is a text file containing email addresses along with additional information for bulk email distribution. Each line in the file contains one or more fields separated by commas (comma-separated values, CSV) or tab characters (tab-delimited file, TDF).

Program website: https://optinsoft.net/