Tools and Diagnostics Center

30 tools built to solve everyday problems, from email delivery and DNS changes to hosting capacity and redirect rules. They run on real DNS and RDAP lookups or on calculations in your browser, separate definite problems, possible issues and unverifiable states, and suggest a fix for each finding. Your inputs are not added to the address bar and are not stored.

Email tools

• Why isn't my email arriving?Check your domain's MX, SPF and DMARC records instantly and find out why your email bounces, never arrives or lands in spam.
• SPF record analyzerCheck your SPF record's syntax, duplicate records and the RFC 7208 ten-lookup limit, with the full include tree resolved live.
• SPF merge helperMerge several SPF records or the mail services you use into one valid SPF record; no made-up values are added.
• DMARC wizardBuild a safe DMARC record that matches your readiness and plan the none, quarantine and reject stages step by step.
• DKIM checkLook up your DKIM record by domain and selector and see key type, length, test mode and syntax errors.
• MX provider detectionFind out from the MX records which service receives your domain's email; guesses are never presented as fact.
• Email header analyzerDecode message headers in your browser: SPF, DKIM and DMARC results, relay path and delays, with addresses masked locally.
• SMTP error explainerExplains SMTP bounce codes such as 550, 554 and 421 and enhanced codes like 5.7.26 in plain language, with a fix for each.

Domain and DNS tools

• Why isn't my domain loading?Check registration status, name servers, DNSSEC, A/AAAA and www records in one go to find out why your site will not load.
• DNS change dry-runCompare a planned DNS change with the live records before applying it and catch CNAME conflicts, a second SPF or a vanishing MX in advance.
• DNS record diffCompare your old provider's zone file with live DNS, or two zone files with each other, and see missing and extra records line by line.
• Name server change checklistBefore changing name servers, check your current records, DNSSEC status and the new servers, and get a step-by-step list for a seamless switch.
• DNS propagation comparisonSee the current answers and remaining TTL of a DNS record on Google, Cloudflare, Quad9, AdGuard and AliDNS side by side.
• TTL plannerWork out in your local time when to lower the TTL before a DNS change and when to raise it back.
• DNSSEC checkClassify your domain's DNSSEC as validated, bogus or unverifiable, and see DS/DNSKEY matching and signature expiry.
• CAA checkCheck whether your domain's CAA records allow the SSL provider you choose (Let's Encrypt, Sectigo, etc.) to issue certificates.
• Subdomain setup helperPoint a subdomain such as blog.yourdomain.com to the same hosting, an IP address or an external service like Shopify or Vercel with the right record.
• Domain lifecycle (RDAP)See your domain's registration, expiry and last-changed dates, status codes and transfer lock from the official RDAP service.

Hosting and migration tools

• Website migration plannerGet a step-by-step plan and an estimated transfer time for moving your site to a new host, based on your source, size and downtime tolerance.
• Hosting plan matcherCompare your sites, disk, traffic, email and database needs with the current OrienHost plans and find the right plan for you.
• Billing and renewal calculatorWork out the 1–5 year total cost and savings of monthly, quarterly, semi-annual and annual billing for a hosting plan and domain.
• Disk space plannerCalculate your disk need from site files, media, database, email and backups, and the usage in 6–24 months with growth.
• Traffic calculatorCalculate your monthly hosting traffic and peak-hour request rate from visits, page weight, caching and bot share.
• Inode estimatorCalculate total inode usage from your site files, cache and stored email counts and compare it with the plans' inode limits.
• Backup storage plannerCalculate the storage your backups need from your daily, weekly and monthly retention, change rate and number of copies.
• Reseller capacity and cost plannerWork out which reseller plan fits your client count and package mix, the cost per client and your estimated margin.

Site management tools

• Redirect rule builderGenerate 301 redirect rules for Apache/LiteSpeed (.htaccess) and Nginx, with automatic checks for loops, chains and open redirects.
• robots.txt analyzerCheck your robots.txt against RFC 9309: lines blocking the whole site, unsupported directives and whether a path is open for a crawler.
• Sitemap checkerCheck your XML sitemap safely in the browser: relative and foreign URLs, invalid lastmod, duplicates, hreflang and the 50,000-URL limit.
• Error log interpreterGroup and explain PHP, Apache, LiteSpeed and Nginx error logs in your browser; IPs, emails and user names are masked locally.