SenderMap
Free email sender lookup · no signup

Map every sender
behind any domain.

SenderMap reveals the SPF, DKIM, DMARC, BIMI, MX, ESP and hosting stack of any domain — in a single view. Built for deliverability, security and infra teams.

Try stripe.com · github.com · notion.so · shopify.com

Why domain architecture matters

A domain's DNS posture decides whether your emails are trusted, spoofed, or silently dropped.

Spoofing & phishing

Without strict SPF/DKIM/DMARC, attackers can forge mail from your domain. One missing DNS record can become a brand crisis.

Inbox placement

Mailbox providers downrank or junk mail from poorly configured domains. Posture is the foundation of deliverability.

Vendor due diligence

Check a partner, prospect or competitor's stack in seconds. Know what ESP they use, where they host, and how they're secured.

How it works

  1. 01

    Enter a domain

    Paste any apex domain like stripe.com. No account needed.

  2. 02

    We resolve the architecture

    DNS, MX, SPF, DKIM, DMARC, BIMI, WHOIS, ASN and ESP — in parallel.

  3. 03

    Read the result

    Posture pills, provider tiles and a clear stack overview.

Frequently asked

Next step

Architecture looks good. Does it actually land?

SenderMap shows you how a domain is wired. MailAnalyze tells you whether messages from it reach the Primary inbox — across Gmail, Outlook, Yahoo and more.

Test inbox placement