Stop digging through logs. When email breaks, Numonic finds it first.
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.
One-time setup. Nothing about your sending infrastructure changes. SES is available today. Resend, SendGrid, and Postmark coming next.
SES today · Resend, SendGrid, Postmark nextLink Google Postmaster, DMARC reports, and reputation feeds.
OAuth · DNS · APIWhen 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 · PagerDutyNobody 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.
Numonic connects them all and tells you when something needs attention.
Domain reputation, spam rates, and delivery errors from Google's inbox.
Authentication failures and alignment issues, parsed automatically.
Continuous monitoring across Spamhaus, Barracuda, Proofpoint, and others.
IP reputation and spam trap activity for Outlook and Hotmail.
A plain-English guide to how email authentication really works. Why inbox providers distrust every sender by default, why email can't prove who sent a message, and how DNS plus SPF, DKIM, and DMARC let you prove you're really you.
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Literally, what is a DNS record? A no-analogy explanation of the Domain Name System, the fields every record has (name, type, value, TTL), the common record types, and why SPF, DKIM, and DMARC are just TXT records you add to your domain.
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An SES SMTP connection that hangs and times out is a network problem, not a login problem. Here's why port 25 is the usual culprit on EC2, which ports and TLS modes to use instead, and how to fix it fast.
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By the time you see bounces climbing in the SES console, the damage is often done. Here's how to put a CloudWatch alarm on your reputation metrics so you hear about it first — and why the alarm is a floor, not the whole picture.
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This isn't a bug in your code — it's a permissions error. Here's the one policy that fixes it, the identity you have to attach it to, and why it's not the same thing as the sandbox.
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The v3 SDK, a send that works on the first try, and the two gotchas — region mismatch and credentials — that make almost everyone's first attempt silently fail.
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You added the DNS records but SES still says pending. "Pending" almost never means wait longer — it means SES can't see your records. Here are the four reasons, in the order to check them.
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SES returned a 200 and a message ID, but your user got nothing. Here's what "sent" really means in SES, the three places messages silently disappear, and how to trace one step by step.
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SES paused your account over bounces or complaints. Here are the thresholds, why each number climbs, how to bring it back down, and how to write the remediation plan AWS actually accepts.
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SES is rejecting your login with a 535 error. The cause is almost always the same mistake — using AWS access keys as SMTP credentials. Here's how to generate the right ones and the three gotchas that still cause a 535.
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One of the most important deliverability metrics in your dashboard isn't measuring what you think it is. Your real Gmail complaint rate is probably 3–5× higher than what your ESP shows.
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Your ESP says delivered, but customers never receive the email. Here's how to troubleshoot authentication, reputation, blocklists, and other common causes of spam placement.
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Password resets, receipts, and important emails can fail because of missing SPF, DKIM, or DMARC records. Learn what these records do and check your domain in seconds.
Read post →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.