To mitigate issues related to port blocking, consider the following strategies:
Use Port 587: This port is widely accepted and is the preferred choice for SMTP submission. Alternative Ports: If port 587 is blocked, consider using port 2525 or other alternatives recommended by your email service provider. Switch to a Reputable ESP: Use a reputable Email Service Provider (ESP) that has strong relationships with ISPs and can help navigate port blocking issues. Monitor Email Metrics: Keep a close eye on your email performance metrics to identify and address delivery issues promptly.