Based on documentation for popular versions like the SMTP2SMS project on SourceForge , the package generally includes:
: Many carriers provide Email-to-SMS gateways for free or at a lower cost than dedicated SMS APIs. SMTP2SMS.zip
: SMS sent via SMTP can sometimes face delays compared to direct SMSC (Short Message Service Center) routes, as they must pass through traditional email queues first. Based on documentation for popular versions like the