Median web page weight in 2025: 15 years of web bloat
The median web page weight has grown 5x in 15 years. HTTP Archive data, resource breakdown by type, SEO impact, and projections for 2026-2028.
CaptainDNS Blog
DNS, email authentication, AI integrations and product updates.
Technical guides, comparisons and insights on public DNS resolvers (Cloudflare, Google, Quad9), email authentication (SPF, DKIM, DMARC, BIMI, ARC) and deliverability. Learn how to configure Amazon SES, Brevo, SendGrid or Mailjet, and explore our AI integrations with ChatGPT and the MCP protocol. Whether you're a sysadmin, developer or marketing manager, find best practices here to secure your domains and optimize your email delivery.
Articles
February 2026
Crawl budget: understanding and optimizing how Google crawls your site
Crawl budget determines how many pages Googlebot explores on your site. Learn how to analyze it, optimize it, and avoid common pitfalls.
Googlebot's 2 MB Crawl Limit: What Happens When Your Pages Are Too Heavy
Google only crawls the first 2 MB of a page's HTML source. Beyond that, content is truncated and never indexed. Here's what it means for your SEO.
Configure MTA-STS for Microsoft 365 and Google Workspace
Step-by-step tutorial to deploy MTA-STS on Microsoft 365, Google Workspace, and Cloudflare. MX patterns, policy file, hosting, and validation included.
Spamhaus vs Barracuda vs SpamCop: Complete Email Blocklist Comparison
Detailed comparison of the 3 main email blocklists: detection methods, false positive rates, delisting procedures, and impact on Gmail, Outlook, and Yahoo deliverability.
Why Your Emails End Up in Spam: The Complete Diagnostic Guide
Are your emails consistently landing in spam? This guide analyzes the 5 main causes and gives you a concrete action plan to restore optimal deliverability.
How to Remove Your IP from a Blacklist: The Complete Delisting Guide
Is your IP on a blacklist and your emails getting rejected? This guide details the delisting procedures for each major blacklist, including processing times and best practices to avoid getting listed again.