Learn how to set up a complete email system on CentOS 7 using Postfix, Dovecot, MariaDB, Nginx, and Roundcube, covering software installation, configuration, database setup, SSL/TLS, DKIM, SPF, DMARC, and testing, with detailed commands and troubleshooting tips.
Learn step‑by‑step how to set up a fully functional, self‑hosted email system on CentOS 7.9 using Postfix, Dovecot, MariaDB, OpenDKIM and Nginx, covering software installation, configuration files, database schema, TLS/SSL, DNS records, and webmail integration with Roundcube.
This step‑by‑step guide shows how to set up a fully functional, self‑hosted mail system on CentOS 7 using Postfix, Dovecot, MariaDB, OpenDKIM and Roundcube Webmail, covering software installation, database schema, service configuration, DNS records, TLS/SSL, firewall rules and testing procedures.
This guide reviews six popular open‑source mail servers for Linux—Postfix, Exim, Dovecot, OpenSMTPD, Mailcow, and iRedMail—detailing their features, advantages, installation commands, and a comparative table to help you select the most suitable solution for stability, security, and ease of deployment.
This guide reviews five reliable open‑source mail transfer agents—Postfix, Exim, Qmail, Courier, and Dovecot—detailing their key features and providing exact installation commands for both Debian/Ubuntu and RHEL/CentOS environments.
This guide reviews the five most reliable open‑source mail servers for Linux—Postfix, Exim, Qmail, Courier, and Dovecot—highlighting their key features and providing exact installation commands for both Debian/Ubuntu and RHEL/CentOS distributions.
This tutorial explains how to set up DNS records, install Postfix and Cyrus‑SASL, configure authentication, create necessary configuration files, add users, and test SMTP on an Ubuntu server to reliably send emails without landing in spam folders.
A MySQL fatal error claiming "Can't create/write to file ... (Errcode: 28)" turned out not to be a lack of disk space but exhausted inodes caused by millions of tiny maildrop files generated by cron‑driven Postfix notifications, and the article walks through the investigation and fix.
A MySQL fatal error citing Errcode 28 can stem from inode exhaustion caused by a flood of cron-generated emails, not just lack of disk space, and the article walks through diagnosing the issue with df, df -i, and locating the offending Postfix maildrop directory.
A Linux server became unreachable with a massive load average of 360 due to exhausted inodes caused by a runaway postdrop process, and the issue was resolved by cleaning the maildrop directory and silencing the offending cron job.
