SFMC Deliverability Incident Analyzer

Your send suddenly spikes in bounces. Is it reputation, authentication, an ISP block, or bad data? Drop your _Bounce export and get a diagnosed incident report that tells you where to start.

Runs entirely on this machine. This file contains no network calls of any kind — no upload, no analytics, no external scripts or fonts. Disconnect from the internet and it still works. Your bounce export is read in the browser and never leaves it. Open the file in any text editor to verify that for yourself before you use it on customer data.

Drop your _Bounce CSV here, or click to choose a file

CSV exported from the _Bounce data view.

Need the export? Grab the query below.

Don’t have the export? Copy this _Bounce query (SFMC SQL / Automation Studio)

T-SQL dialect. Last 30 days. Run as a Query Activity, target a data extension, then export the DE.

SELECT
    b.JobID,
    b.SubscriberKey,
    b.EventDate,
    b.Domain,
    b.BounceCategory,
    b.BounceType,
    b.SMTPCode,
    b.SMTPBounceReason,
    b.SMTPMessage
FROM _Bounce b
WHERE b.EventDate > DATEADD(DAY, -30, GETDATE())

Bounce rate needs total sends too. Optional companion:

SELECT Domain, COUNT(*) AS Sent
FROM _Sent
WHERE EventDate > DATEADD(DAY, -30, GETDATE())
GROUP BY Domain

Deliverability Incident Summary

By mailbox provider

Normal Elevated Critical Flagged when a provider’s bounce rate runs well above the overall rate.

Bounce composition

Top SMTP responses

Diagnosis

Immediate actions

Reputation & blocklist checks

Still unclear from the result?

Send us the anonymized report and the Genetrix SFMC team will review the root cause with you. — genetrix.tech

How it reads your file. Bounces are bucketed into Hard, Block, Soft and Technical from your BounceCategory / BounceType, grouped by mailbox provider from Domain, and ranked by SMTP response. Severity bands are general email-program guidance (under 2% healthy, 2–5% elevated, 5–10% high, over 10% critical), not Salesforce SLAs. Spam-complaint rate is a separate signal to check in Google Postmaster Tools and Microsoft SNDS — this file measures bounces, not complaints. Field names follow the SFMC _Bounce data view; confirm against your account.