1st Mail Sender sends notification messages or requested newsletters to your subscribers by email. Providing some service, you would like to notify your users about significant events, send invoices or price lists as well as organize email-based subscriptions on your web sites. 1st Mail Sender is the best solution for such purpose. You can maintain subscription-based mailing lists with a lot of topic groups automatically via email or manually, send email messages to the mailing list subscribers, do an e-mail address management with smart filtering, and much more. This program allows you deliver messages directly to the recipient mailing boxes or via outgoing SMTP server and controls sending speed to prevent your servers from overloading.