If you send bulk email with PowerMTA, bounces are part of daily life. The difference between a healthy sender and a ruined IP reputation often comes down to how well you handle them. This PowerMTA bounce processing setup guide walks you through the complete workflow: understanding hard and soft bounces, reading PowerMTA accounting files, configuring … Read more
Learning to install PowerMTA AlmaLinux is the fastest way to get a high-performance, self-hosted email server running on Red Hat’s most popular free clone. PowerMTA is the industry-standard mail transfer agent used by high-volume senders for its unmatched deliverability controls, delivery speed, and per-domain reputation management. AlmaLinux 9, with its RHEL binary compatibility and long … Read more
Choosing a mail transfer agent is one of the most consequential infrastructure decisions an email sender makes. The two names that dominate serious sending are PowerMTA and Postfix — but they serve very different users. In this PowerMTA vs Postfix comparison, we break down cost, performance, deliverability tooling, and ease of use so you can … Read more
UFW — Uncomplicated Firewall — is the simplest way to control network traffic on Ubuntu, and it is powerful enough for production servers. This UFW firewall Ubuntu guide covers everything from first install to advanced rules, including the exact port setup mail servers need. By the end, your server will accept only the traffic you … Read more
A fresh VPS is probed by automated attackers within minutes of going online — often before you finish your coffee. Learning how to run a secure VPS is not optional; it is the first job of every server owner. This guide gives you 15 essential steps that take a default Ubuntu install from wide-open to … Read more
Buying your first virtual server from OVHcloud is exciting — and slightly confusing the first time. This OVH VPS setup guide walks you through the entire process, from creating your OVHcloud account to deploying Ubuntu and locking down SSH, in plain beginner-friendly steps. Follow along and you will have a working, secure server in under … Read more
A proper bimi setup puts your brand logo next to your emails in the inbox — one of the strongest visual trust signals you can add to your email program. Once configured, Gmail, Yahoo, and Apple Mail display your actual logo beside the sender name, but only if your domain passes strong authentication. This guide … Read more
If you run a self-hosted email server, your VPS provider matters as much as your software stack. Picking the wrong host can mean blocked ports, blacklisted IPs, and support tickets that go nowhere. This hetzner vs contabo comparison looks at both providers through the lens of an email marketer or sysadmin: pricing, specs, network performance, … Read more
Email throttling is one of the most misunderstood — and most powerful — techniques in the email sender’s toolkit. Every major mailbox provider, from Gmail to Outlook, throttles inbound mail to protect its users. If you blast 50,000 messages at once from a fresh IP, you will not get fast delivery; you will get rate-limited, … Read more
Sending bulk email from a single IP address is the fastest way to hit Gmail and Outlook rate limits, burn your sender reputation, and land every campaign in the spam folder. Postfix IP rotation is the practice of spreading your outbound mail volume across multiple IP addresses so no single IP carries enough traffic to … Read more