https://guushu.com/notes/ Production notes from building small web products on Cloudflare: incidents, fixes and setups that actually happened. en https://guushu.com/notes/cloudflare-zone-security-checklist/ https://guushu.com/notes/cloudflare-zone-security-checklist/ Wed, 16 Sep 2026 00:00:00 GMT A Cloudflare zone security checklist of 12 read-only checks, TLS to audit log, each with the curl or dig that verifies it. About 10 minutes per zone by hand. https://guushu.com/notes/cloudflare-email-worker-inbox-d1/ https://guushu.com/notes/cloudflare-email-worker-inbox-d1/ Wed, 16 Sep 2026 00:00:00 GMT A Cloudflare Email Worker inbox in about 30 lines of TypeScript: the email() handler, D1 schema, wrangler config, and 3 self-hosted inboxes built the same way. https://guushu.com/notes/cloudflare-email-routing-vs-google-workspace-zoho/ https://guushu.com/notes/cloudflare-email-routing-vs-google-workspace-zoho/ Wed, 16 Sep 2026 00:00:00 GMT Cloudflare Email Routing vs Google Workspace vs Zoho vs a self-hosted Worker inbox in one table: what each stores, who can reply as support@, cost for 2 people. https://guushu.com/notes/cloudflare-email-routing-support-address/ https://guushu.com/notes/cloudflare-email-routing-support-address/ Wed, 16 Sep 2026 00:00:00 GMT Set up a Cloudflare Email Routing support address in 10 minutes for $0, then the 3 limits you hit next: no mailbox, no shared handling, no replying later. https://guushu.com/notes/cloudflare-bill-incidents-2026/ https://guushu.com/notes/cloudflare-bill-incidents-2026/ Tue, 15 Sep 2026 00:00:00 GMT Eight Cloudflare bill spikes from 2026, seven on D1 rows read and one Durable Objects alarm loop: what moved, how far, and where to see it before the invoice.