5 key benefits of using an SMTP relay service:
The provider become your sending infrastructure (so its good reputation becomes yours) You can send large volumes of emails (the service helps you scale and grow your email volume as needed) Expert technical support (compared to having to figure it out on your own if you manage your own SMTP service) You get a clear view into deliverability issues and data insights (the service helps you collect deliverability data) Time-saving, user-friendly interfaces (unlike self-managed servers with basic UI)