docs(email): document mail-client autodiscovery + external-DNS records

Reflects the new customer "Mail Client Setup" section on the Email page.

- create-an-email-account.mdx: new "Auto-configure your mail app" section —
  explains clients self-configure from DNS, that domains on our nameservers
  are already set, and the records to add when DNS is hosted elsewhere
  (Cloudflare/GoDaddy/etc.) with the full RFC 6186 record table + screenshot.
  Reframe "Set up your email client" as the manual fallback.
- manage-dns-records.mdx: cross-link "Mail autodiscovery records" subsection.
- New capture-email.ts + whp-email-autodiscovery.png (fleet-redacted: mail
  host shown as <mail-server>.cloud-hosting.io; demo domain kept visible).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-06-22 08:11:44 -07:00
parent 03aa273100
commit 0b53569821
4 changed files with 144 additions and 1 deletions
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