Network and security specialist focused on VPN protocols, proxies and server hardening. Cooper spends his days breaking and fixing tunneling setups (WireGuard, V2Ray, Xray) so readers can follow battle-tested configurations instead of guesswork.
567 posts
What you will read?1 Choosing the Right VPS Hosting for High Email Deliverability2 Configuring Your VPS for Optimal Email Performance3 Setting Up Reverse DNS for Better Email Reputation4 Optimizing Email Sending Practices for Better Results5 Here’s why email deliverability is particularly important when using a VPS Email deliverability is crucial for any business or service…
Email aliases are used to forward incoming emails from one address to another. By setting up email aliases on your VPS, you can route emails sent to different addresses to a single inbox or redirect them to other users. The process of setting up email aliases is straightforward, and Postfix, as a common mail server,…
What you will read?1 How to Find Email Sending Limits for Your VPS2 Tools to Monitor Email Sending Limits3 How to Set Up Email Monitoring on VPS4 How to Analyze Email Logs for Sending Limits Monitoring email sending limits on a VPS is crucial for maintaining smooth email operations and preventing service disruptions. Many VPS…
What you will read?1 Configuring SPF on a VPS Server2 Testing and Verifying SPF Setup3 Common SPF Errors and Troubleshooting4 Prerequisites for Setting Up SPF Sender Policy Framework (SPF) is an email authentication protocol designed to detect and prevent email spoofing. It allows domain owners to specify which mail servers are authorized to send emails…
What you will read?1 IMAP vs POP3: A Comparison2 Port Numbers for IMAP and POP33 Secure IMAP and POP3 Connections4 Choosing the Right Protocol for Your Needs5 IMAP vs POP3: A Comprehensive Comparison The two most common protocols for transferring emails from a mail server to an email client are IMAP (Internet Message Access Protocol) and…
What you will read?1 Checking Server Logs for Errors2 Resolving SPF, DKIM, and DMARC Issues3 Addressing Blacklisting and Spam Filters Email delivery issues can cause significant disruptions, especially when running services on a VPS. Understanding the common problems and troubleshooting steps is essential to ensure smooth communication. These issues may range from simple configuration errors…
What you will read?1 Checking Existing Firewall Rules on Your VPS2 Opening Email Ports on Your VPS Firewall (Port 25, 465, 587)3 Closing Email Ports on Your VPS Firewall4 Why Email Ports Need to Be Opened and Closed on a VPS?5 Conclusion Managing email ports on a VPS firewall is crucial for ensuring that your…
What you will read?1 How to Use Telnet to Test Email Ports2 Using Netcat to Check Email Ports on Your VPS3 Testing SMTP Port 25 with Telnet and Netcat4 Verifying Secure Email Ports (465, 587) with Telnet and Netcat Email port testing is a crucial step in ensuring proper email communication on your VPS. Email…
What you will read?1 Installing Postfix and Dovecot on VPS2 Configuring Postfix for Outgoing Mail3 Setting Up Dovecot for Incoming Mail4 Configuring SSL/TLS for Secure Mail Transmission5 Preparing Your VPS for a Mail Server Setup Postfix and Dovecot are among the most popular and reliable open-source solutions for setting up a secure mail server on…
