Open Terminal

Email Deliverability

Backend required

Review the technical factors behind inbox placement: authentication, reverse DNS, TLS and blacklist status for your sending domain and IPs.

Backend integration required. Email Deliverability needs a secured server-side service for DNS queries and external data sources to run safely. That service isn’t live yet, so this tool can’t run — and we won’t show simulated results.

In the meantime, try the User Agent checker or browse all tools.

Planned interface

Preview — not functional yet
Email Deliverability input (disabled)

Results will appear here once Email Deliverability is available.

How it works

Checks measurable, technical factors only: SPF/DKIM/DMARC alignment, forward-confirmed reverse DNS for sending IPs, TLS support and DNSBL listings.

Safeguards & responsible use

  • Only public domain names are accepted; internal names (.local, .internal, …) are rejected.
  • Queries go to public resolvers, never to internal DNS.
  • Per-client rate limiting and query timeouts.

Frequently asked questions

Can this guarantee inbox delivery?

No. Mailbox providers also weigh content, engagement and reputation history they don’t publish. This tool checks the technical prerequisites.

Will it show a deliverability score?

Only results of real checks are shown. NetTools does not invent reputation scores.