Tech Blog

Is your cPanel server IP on a blacklist? Follow this step-by-step 2026 guide to identify blacklists, submit delisting requests, and prevent re-blacklisting.

Plesk Let's Encrypt not working? Fix ACME challenge failures, SSLCertificateFile missing errors, wrong certificate served, and renewal failures on nginx and Apache.

What does server management cost for digital agencies in the UK in 2026? Rough price ranges, cost drivers, hidden costs and how to compare quotes.

Learn how to install, configure, and tune PHP OPcache in DirectAdmin using CustomBuild 2.0. Includes production-ready settings for memory, file limits, and how to stack Redis object caching for maximum PHP performance.

Step-by-step guide to installing a custom SSL certificate in Plesk. Import your certificate, assign it to domains, set up auto-renewal, and fix common errors.

Learn how to manage, clear, and prevent stuck email queues in Plesk. Troubleshoot deferred messages, diagnose queue issues, and optimize mail server performance.

Step-by-step guide to setting up and configuring email accounts in DirectAdmin — covers DNS, DKIM, SPF, quotas, and client settings.

Complete Plesk email not sending troubleshooting guide: fix port 25 blocks, Amavis failures, deferred queue errors, transport unavailable, and Postfix configuration issues.

Set up and tune SpamAssassin in Plesk to block incoming spam server-wide. Covers scoring thresholds, greylisting, blacklists, and per-mailbox settings.

Fix cPanel BoxTrapper stuck emails: release queued messages, whitelist senders, and stop legitimate mail from being blocked.

Step-by-step guide to install and configure PHP OPcache in DirectAdmin using CustomBuild. Includes memory sizing, multi-PHP-version setup, and performance verification.

Fix Plesk HTTPS errors — 502 Bad Gateway, ERR_CONNECTION_REFUSED, and SSL handshake failures on all sites. Step-by-step for CentOS/RHEL and Debian/Ubuntu with exact commands.

This guide explains how to install and manage Supervisor on a server. It covers basic setup, starting and stopping processes, and managing background services in an easy and practical way.

Step-by-step guide to configuring iptables and FirewallD in Webmin to secure your Linux server — block threats, open only needed ports, and avoid lockouts.

Plesk incoming mail rejected with a Spamhaus "open resolver" DNSBL error? Learn the exact cause, how to confirm it, and how to fix it with a free DQS key.

Step-by-step guide to setting up DKIM, SPF, and DMARC in cPanel. Fix email deliverability issues and stop emails going to spam on your WHM server.

Plesk email going to spam? Fix DKIM signing, SPF record errors, DMARC configuration, PTR reverse DNS, and IP blacklistings with this step-by-step guide.

Fix DirectAdmin and Webmin port conflicts on 2222 and 10000, diagnose bind errors fast, and set safe role boundaries to run both panels without breaking configs.

Install Let's Encrypt SSL on Webmin step-by-step. Configure auto-renewal, fix miniserv.pem errors, and enable HTTPS for your Webmin panel. 2026 guide.

SSL certificate not working after server migration? Fix private key mismatches, broken certificate chains, Cloudflare SSL mode errors, and port 443 issues with this step-by-step guide.

Master DirectAdmin backups and disaster recovery. Learn admin and user-level backup strategies, remote backup configuration, and one-click restoration.

Compare hourly Linux server support vs in-house for ecommerce stores: estimated costs, coverage, risks and when a hybrid model wins for mid-size shops.

A practical server migration checklist for e-learning platforms: audit, rehearsal, cutover, validation, plus cost estimates and provider questions.

Learn how to set up DKIM, SPF, and DMARC in Plesk to fix email deliverability and stop emails landing in spam. Step-by-step guide.