Trusted third-party archives like and MajorGeeks sometimes retain old installers. However, they typically only keep the last two major versions. Search for “Gammadyne Mailer” and look for a “Version History” or “Old Versions” tab. Always verify digital signatures.
Gammadyne’s support team has historically provided private download links for older versions to verified license owners. They are far more accommodating than many assume.
Believe it or not, Gammadyne Mailer v6.0 from 2010 required less than 10 MB of RAM. While the modern version is still lean, some users running massive batch jobs on low-power VPS instances swear by the efficiency of older builds.
This indicates a broken COM registration. Reinstall the old version, or run regsvr32 gmailsmtp.ocx from the Mailer installation folder.