Terry KS Coremail is helping Southeast Asian enterprises strengthen cross-border email delivery with its Secure Email Relay, combining intelligent global routing and advanced security. The solution addresses reliability, cost and cyber risk challenges faced by organisations expanding internationally.
THAILAND, 26 DECEMBER 2025 – As enterprises across Thailand and Southeast Asia accelerate their global expansion, email reliability is emerging as a critical pillar of daily business operations rather than a back-end IT concern. Delayed or rejected emails caused by IP blacklisting, rigid overseas relay infrastructure and growing cyber threats are increasingly disrupting cross-border communications for fast-growing organisations.
Many enterprises attempting to build their own overseas relay infrastructure face high costs with limited effectiveness, as static routing cannot respond to network congestion, outages or submarine cable disruptions. At the same time, cross-border phishing and malicious emails have grown more sophisticated, often bypassing basic filters and exposing organisations to heightened security and compliance risks.
To address these challenges, Coremail, a global provider of secure email solutions, offers its Secure Email Relay designed to enhance both delivery stability and security. The solution deploys intelligent forwarding nodes across multiple regions, ensuring that business-critical emails are delivered reliably despite network volatility.
Coremail CEO Leihua Chen said email continues to serve as the backbone of international business operations. He noted that by stabilising overseas delivery while strengthening defences against external threats, the company aims to help enterprises operate more smoothly and support their regional and global growth strategies.
The Secure Email Relay leverages a global network of more than 50 smart relay nodes, dynamically selecting optimal delivery paths for each email. Traffic is automatically rerouted away from congested or disrupted regions, reducing bounce rates, lowering latency and improving delivery consistency across international markets.
The platform is powered by patented SDN routing and DNS-based link matching technologies, which optimise routing decisions based on destination and message type. This approach enables faster and more predictable cross-border email delivery while reducing the operational cost and complexity associated with maintaining in-house relay infrastructure.
To further strengthen security, Coremail integrates its CAC cloud anti-spam engine, which blocks up to 99.8 per cent of overseas spam and phishing attempts while maintaining a false-positive rate below 0.02 per cent. This helps protect enterprise email systems, safeguard intellectual property and preserve IP reputation across borders.
Today, more than 20,000 enterprises worldwide use Coremail’s Secure Email Relay to address cross-border email delivery challenges. As organisations operate across multiple markets, reliable and secure email delivery is increasingly recognised as essential digital infrastructure for sustaining growth and managing operational risk.