Now in early access · SES support shipping

Email observability
for engineering teams

Stop digging through logs. When email breaks, Numonic finds it first.

Check your domain free See how it works

Email breaks silently.
Your ESP won't tell you.

ESPs give you logs. They don't tell you when something's wrong, why it's wrong, or what to do about it. Most teams find out the same way every time: a customer complains.

Numonic turns symptoms into answers.

Sits on top of your existing ESP.
No migration. No changes.

1

Connect your ESP

One-time setup. Nothing about your sending infrastructure changes. SES is available today. Resend, SendGrid, and Postmark coming next.

SES today · Resend, SendGrid, Postmark next
2

Connect the tools you already use

Link Google Postmaster, DMARC reports, and reputation feeds.

OAuth · DNS · API
3

Issues surface without you looking

When something breaks, Numonic identifies the problem, explains the impact, and recommends the next action. The issue appears in Slack and can be escalated into Jira, Linear, or PagerDuty.

Slack · Jira · Linear · PagerDuty

Answers where your team already works.

Nobody wants another dashboard. Numonic turns email problems into actionable issues and delivers them directly in Slack — a clear explanation of the problem, its impact, and the recommended fix.

No log diving required.

Also pushes to Jira, Linear, and PagerDuty
# email-ops · acme-corp
N
Numonic APP 10:14 AM
✓ Resolved — DMARC pass rate back above 95%
Was 88.1%  ·  Now 97.4%  ·  Open for 3h 41m
N
Numonic APP 2:37 PM
⚠ Warning — Spam rate approaching threshold
Domain: mail.acme.com  ·  Rate: 0.08% (threshold: 0.10%)
Source: Google Postmaster Tools
↩ 2 replies · View thread

The signals your ESP can't see.

Numonic connects them all and tells you when something needs attention.

Google Postmaster Tools

Domain reputation, spam rates, and delivery errors from Google's inbox.

DMARC Reports

Authentication failures and alignment issues, parsed automatically.

Blocklists

Continuous monitoring across Spamhaus, Barracuda, Proofpoint, and others.

Microsoft SNDS

IP reputation and spam trap activity for Outlook and Hotmail.

Free tool

Find problems before your customers do.

Check your SPF, DKIM, DMARC, and MX records in seconds. If something is wrong, we'll tell you exactly what to fix. No account required.

Checking DNS records for
Email health score for

Checks SPF, DKIM, DMARC, and MX records. No account required.