TestMailer 1.4 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This program is an intellectual property of DigiArch.org.
The program lies within Communication Tools, more precisely E-mail Tools. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
From the developer:
Test Mailer enables you to quickly send an email and monitor or debug all communication with the recipient mail server. There is no need for a smtp server, Test Mailer will act as a mail server itself and lookup the MX records for the recipient. Use the advanced options to create special circumstances and save the communication log to inform postmasters about any configuration problems in their email or mail server setup.
You may want to check out more software, such as 4Team Duplicate Killer, Caretaker Antispam or Personal Mail Server Pro, which might be related to TestMailer.