Why the .exe suffix on a tool that ran on non-Windows devices?
Cloud-based software usually forces you to include unsubscribe links and manage compliance. Standalone desktop mailers often give you raw power without guardrails. If you send unsolicited bulk emails to people who haven't consented, you are violating laws like CAN-SPAM (USA) and GDPR (Europe). This can lead to massive fines, not just a blacklisted email address.