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
If your mail suddenly starts bouncing or landing in spam, the first thing to do is check IP blacklist status. An IP that was clean yesterday can end up listed today — compromised scripts, a hacked WordPress site, or even a previous tenant of your VPS can all trigger listings that silently kill your deliverability. … Read more
A proper SPF DKIM DMARC setup is the minimum bar for reaching the inbox in 2026. Gmail, Outlook, and Yahoo now reject or quarantine mail that fails authentication — especially bulk mail. If you run your own mail server, these three DNS records are not optional extras; they are the foundation your deliverability sits on. … Read more
If you have just provisioned a fresh VPS for your mail server, plan to warm up ip address sending gradually before pushing any meaningful volume through it. Skipping this step is the fastest way to get your new IP flagged by Gmail, Outlook, and Yahoo — sometimes within the first hour of sending. Mailbox providers … Read more
Introduction – Citadel Mail Citadel is a powerful, open-source mail server that includes email, calendaring, contacts, and collaboration features. It is simple to install and requires minimal configuration. This guide will walk you through the Citadel mail server setup on a Linux-based VPS or dedicated server. Prerequisites Before starting, ensure you have the following: A … Read more
Introduction Axigen is a powerful, all-in-one mail server solution offering secure email services, calendaring, and collaboration tools. It is an excellent choice for businesses and service providers looking for a reliable and high-performance email server. This guide will walk you through the Axigen mail server setup on a Linux-based VPS or dedicated server. Prerequisites Before … Read more
In today’s digital age, having control over your email infrastructure is more important than ever. Whether you’re a small business owner, a tech enthusiast, or someone who values privacy, self-hosting your email server can be a game-changer. Enter Stalwart Email Server—a lightweight, secure, and efficient email server solution designed to make self-hosting accessible and reliable. … Read more
Setting up your own mail server can seem overwhelming, but with Modoboa and Ubuntu 22.04, it’s easier than you might think. Modoboa is an open-source mail hosting and management platform that integrates seamlessly with Postfix and Dovecot, offering a web-based interface to manage domains, mailboxes, and more. In this complete guide, we’ll walk you through … Read more
hestiacp ssl path to save .pem file on etc/pmta/ssl folder This complete PowerMTA SSL guide walks you through everything step by step. sudo mkdir -p /etc/pmta/ssl cat /home/admin/conf/web/vkttech.xyz/ssl/vkttech.xyz.crt /home/admin/conf/web/vkttech.xyz/ssl/vkttech.xyz.key > /etc/pmta/ssl/pmta.vkttech.xyz.pem add this one config file <source 0/0> allow-unencrypted-plain-auth yes always-allow-relaying yes allow-starttls yes jobid-header x-job process-x-job yes hide-message-source true suppress-local-dsn no </source> smtp-server-tls-certificate /etc/pmta/ssl/pmta.vkttech.xyz.pem … Read more
Zimbra Mail Server is a robust email platform that combines several functionalities, including email, contacts, calendar, and tasks, into a single web interface. Popular among businesses and educational institutions, Zimbra provides a powerful solution for managing email communications. However, ensuring the security of these communications is critical, and that’s where SSL (Secure Sockets Layer) certificates … Read more