In Advanced settings, you can pause every X message(s) for second(s) to perform a sending operation at the maximum possible speed allowed by the SMTP server anti-spam restrictions. Certainly, you can also choose to send e-mails directly from PC without any SMTP server. Its excellent bounced handling function helps you manage your subscription or un-subscription lists.
What's new in this version:
Version 188.8.131.52 is a bug fixing release.