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
Picking the right VPS for email sending is one of the most important decisions you will make when building a mass-mailing setup. The wrong provider means blocked port 25, burned IP addresses, suspended accounts, or an inbox placement rate that never recovers. The right provider gives you a clean IP, open outbound ports, and the … Read more
Good PowerMTA queue management is what separates a mail server that hums along from one that melts down at 50,000 messages. PowerMTA’s queueing engine is powerful but unforgiving: misconfigured, it will either trickle mail too slowly or hammer receivers until they throttle you. This guide covers the practical techniques experienced operators use to keep queues … Read more
Setting up reverse DNS PTR records is one of those small tasks that has an outsized effect on email deliverability. Many providers — Gmail, Microsoft, and most corporate mail gateways — reject or heavily penalize mail from IPs with no PTR record. If you run your own mail server, this is a five-minute job you … Read more