1st Mass Mailer is a very fast mass mailer with a lot of useful features. Many Internet professionals and on-line store owners, to notify their customers about various events and promote their new products, use 1st Mass Mailer. 1st Mass Mailer lets you organize a subscription on your web site. The program allows to quickly import the list of respondents into its internal database, do filter based manipulations on the list, sort and search for duplicate e-mails, and enable or disable individual e-mails. 1st Mass Mailer allows you to create and manage large mailing lists and utilizes the latest in multithreading technology, to send e-mails to you as fast as it is possible. You can create separate, customized mailing lists, with varying number of fields (Name, Address, etc.), which contain information about the recipients. You can easily define messages and insert macro substitution patterns, to be replaced by information from the database, for each recipient, just before dispatching.