Magento 2 SMTP Extension provides secure authentication for store emails. It uses SSL and TLS to protect login data. The system checks the server details before sending any message. This reduces risks and keeps email flow safe. It also supports trusted ports for stable delivery. When the connection is confirmed, the extension sends messages through verified routes. Magento 2 SMTP Extension helps stores send clean and safe emails without exposing sensitive data. This improves trust and keeps communication smooth for users. In many cases, this adds extra safety to each email sent.