SMTP Relay Configuration
The Risu Mail SMTP Relay allows you to leverage our global delivery infrastructure without changing a single line of code in legacy applications, CMS platforms, or enterprise frameworks.
Global Connection Parameters
Host: smtp.risu.in
Port: 587 (STARTTLS) or 465 (Implicit TLS).
Username: Your API Key primary access ID.
Password: Your secret API key token.
Authentication: Required (Plain or Login).
Implementation Examples
NodeMailer: use 'smtp.risu.in' with secure: false on port 587. Ensure 'tls.rejectUnauthorized' is false if testing in self-signed environments.
Python SMTPLib: use smtplib.SMTP('smtp.risu.in', 587) followed by server.starttls().
PHPMailer: Set SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS and Port = 587.
SMTP vs API: Which to choose?
Use SMTP for: WordPress plugins, Laravel Mail, legacy ERP systems, and scanners.
Use API for: Complex variable injection, real-time status polling, and high-concurrency microservices where TCP socket reuse is critical.
Ready to integrate?
Start building with our free tier and follow our detailed API contract.