Using a dedicated SMTP service offers numerous advantages over a regular mail server, which often imposes strict limits on hourly or monthly sends. Regular SMTP servers may not be sufficient for high-volume senders, as many ESPs (Email Service Providers) or ISPs (Internet Service Providers) impose restrictions on the amount of emails sent to prevent spam. With a professional SMTP service, you bypass these limitations, ensuring reliable, scalable sending with better deliverability for your email campaigns.