Seamless SMTP service for legacy applications, MTA migrations, and on-premise systems
MX18’s global SMTP relay infrastructure delivers blazing-fast throughput, bulletproof reliability, and real-time visibility—all in one plug-and-play platform.
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Why MX18 SMTP?
Works with any MTA—no code changes required
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Benefit from our battle-tested MTA, with over 10 years of production uptime in high-volume environments
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Optimized routing across our network for maximum throughput
Gain real-time insights into every SMTP transaction with comprehensive logs
99.99 % SLA, TLS 1.3, authenticated ciphers, SOC 2 Type II, GDPR-ready
Dedicated onboarding, proactive deliverability checks, and 24/7 SLA-backed support
Works with any MTA—no code changes required
Benefit from our battle-tested MTA, with over 10 years of production uptime in high-volume environments
Optimized routing across our network for maximum throughput
Gain real-time insights into every SMTP transaction with comprehensive logs
99.99 % SLA, TLS 1.3, authenticated ciphers, SOC 2 Type II, GDPR-ready
Dedicated onboarding, proactive deliverability checks, and 24/7 SLA-backed support
Key Benefits
Point your MX records and enter your credentials—no SDK required
Automatic sending profiles and warmup schedules maximize deliverability
Enforce SPF, DKIM, and DMARC at the gateway; manage everything from our dashboard
Scale seamlessly from tens to millions of emails per day with automatic failover
Encrypted relay with audit logs, 99.99% uptime SLA, and enterprise-grade certifications
Integration Steps
Create SMTP Credentials in the MX18 dashboard
Configure Your App (Host, Port, User, Password)
Verify Domain Authentication (SPF/DKIM)
Monitor and Optimize via live logs and reputation metrics
Real-Time Analytics
AI Optimization
Smart Routing
Reputation Management
Transactional Email
Deliverability Intelligence
Real-Time Analytics
AI Optimization
Smart Routing
Reputation Management
Transactional Email
Deliverability Intelligence
High Deliverability
Automated
Digital Communication
Fast Integration
Global Scale
AI Optimization
Multi-Channel
High Deliverability
Automated
Digital Communication
Fast Integration
Global Scale
AI Optimization
Multi-Channel
