Deliverability monitoring for outbound teams

Your cold email is dying in spam.
Know before your pipeline does.

Aurelius watches your sending domains around the clock — SPF, DKIM, DMARC, MX and 10 blacklists — and alerts you the moment a record breaks or an IP gets listed.

Full SPF + DKIM + DMARC + blacklist report in ~5 seconds. No signup needed.

How it works

Add your sending domains

Your main domain plus every outreach lookalike. Takes a minute; the first audit runs immediately.

We watch them continuously

SPF lookup counts, DKIM keys, DMARC policy, MX and 10 blacklists — re-checked daily (Pro: every 6 hours) and fingerprinted for drift.

You get alerted on regressions

A record breaks, a key rotates, an IP gets listed — Slack or webhook alert within one sweep, with what changed and how to fix it.

One broken record = zero replies

Gmail and Microsoft hard-enforce authentication. A stray SPF include, an expired DKIM key, or a missing DMARC policy silently routes your whole sequence to spam.

The 10-lookup limit nobody checks

SPF allows 10 DNS lookups; every ESP eats a few. Go over and SPF returns permerror — silent failure. Aurelius counts them on every check, nested includes and all.

Blacklists don't send memos

Spamhaus, SpamCop, Barracuda and 7 more, queried on every sweep. If a domain or its IP gets listed you get an alert — not a quarter of mystery bounces.

Drift detection

An intern edits DNS, an ESP rotates keys. We fingerprint your auth setup and alert on any change, with full history of what changed and when.

Built for outbound, priced for outbound

Aurelius SDREnterprise DMARC suitesCold-email platform bundles
Made forSDR & agency sending domainsIT / security teamsTheir own platform users
SPF 10-lookup counting✓ every checkSomeRare
Blacklist monitoring✓ 10 listsAdd-on tierPartial
Works with any ESP✓ DNS-level, tool-agnostic✗ locked to their stack
Price for 25 domains$15/mo flat$36–200+/mo$94+/mo platform fee

Pricing

Free

$0 forever
  • 2 sending domains
  • Daily checks
  • SPF lookup counting
  • Webhook & Slack alerts
  • All free tools
Start free

Free deliverability tools

Cold Email Domain Grader

One input, full report: SPF, DKIM, DMARC, MX and blacklists, graded A–F.

SPF Checker

Validate your SPF record and count DNS lookups against the limit of 10.

DMARC Checker

Check your DMARC record, policy strength and reporting setup.

DKIM Checker

Find your DKIM selectors and verify key length and validity.

Blacklist Checker

Check your domain and IPs against 10 major DNS blacklists.

DMARC Report Analyzer

Parse DMARC aggregate XML reports entirely in your browser — never uploaded.