Is Email Hosted by Tutanota

Use this endpoint when you need to specifically detect Tutanota as the email hosting provider for a single domain. It is ideal for sales intelligence, lead enrichment, pre-migration audits, or deliverability research where knowing a company uses Tutanota is actionable. Prefer this over generic MX lookup tools when you need a direct yes/no answer with matched pattern details rather than raw DNS data. Use the bulk sibling endpoint instead when checking multiple domains at once.

• Domain does not exist or has no MX records — returns no match with empty MX list
• DNS resolution failure via Cloudflare DoH — may return an error or inconclusive result
• Domain uses Tutanota but with non-standard MX patterns not yet in the matcher — false negative
• Malformed domain input — likely returns an error or empty result
• Transient network timeout reaching Cloudflare DoH — may result in a failed lookup