Remember that most ISPs and hosting companies have very aggressive anti-spam policies. You should only be sending email to contacts that are expecting to receive email from you. Mach5 Mailer is not licensed for "spam" use.
A Few Kudos...
Software Seeker Editor's Pick
Good Review at ListSoft
Mach5 Mailer: The Comprehensive Bulk Email Solution
Send customized email messages to an unlimited number of customers with our
Mach 5 Mailer, at speeds of over 10,000 messages per hour!
Simple, Fast, and Effective. Free License available.
Fast Sending. Easy Scheduling. Mach5 Mailer has the power to get the message out using a remote SMTP Server, Local SMTP or Mailer Express! Full ESMTP, SSL, and TLS authentication support.
Fast, Multi-Threaded Sending
Mailer can generate up to 30 messages per second and is designed to take advantage of modern Multi-core CPU's.
Mail Scheduling Built-In
Schedule multiple mailings to fire off as often as you like.
Actively Supported, Developed, and Updated
Mach5 Mailer is constantly updated and upgraded with new features, many taken from customer suggestions. We recently released Mailer 4.5 with full Windows Vista support, a free upgrade for all our Mailer 4 customers.