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Neutrino · Excel Guide

Check Domain Reputation Against DNS Blocklists in a Excel workbook Using Neutrino

2026-05-15
5 min read

The Scenario

You're an email deliverability consultant and you have an Excel workbook with 200 client sender domains in column A — a mix of clients across retail, SaaS, and B2B services. Three are reporting inbox placement problems. Before you walk into a client call and tell them their domain is on a blacklist, you need to verify it. For all 200.

You have a client call in two hours.

The bad version:

  • Open a DNS reputation check tool, type the first domain, note the blacklist count and affected lists in a side document
  • Repeat for each domain, switching between browser and workbook
  • Hit a session timeout at domain 90 and lose your place in the results view

You bill hourly. This is not a billable task. It's preparation for a billable task, and it's eating a third of your morning.

The Easy Way: One Prompt in SheetXAI

SheetXAI is an AI agent inside your Excel workbook. Through its built-in Neutrino integration, it runs a host reputation check on every domain in column A and writes the blacklist count and affected list names directly into the workbook.

For each domain in column A, run a Neutrino host reputation check and write the blacklist count and any flagged lists into columns B and C.

What You Get

  • Column B: the number of DNS blocklists the domain appears on
  • Column C: the specific list names where it is flagged
  • All 200 domains processed before your client call — sorted by column B to instantly surface the highest-risk senders

What If the Data Is Not Quite Ready

You want to flag any domain with more than 2 hits as a priority case

Check all 200 domains in column A against Neutrino host reputation. Write the blacklist count in column B and the flagged lists in column C. Mark any domain with more than 2 hits as FLAGGED in column D and highlight those rows red.

Domains have subdomain prefixes that should be stripped

For each domain in column A, strip any subdomain prefix and write the cleaned domain in column B. Then run Neutrino host reputation on the cleaned domain and write the blacklist count in column C and flagged lists in column D.

You want a per-client summary for the deliverability report

Run Neutrino host reputation on all domains in column A. Write the blacklist count in column C and flagged lists in column D. Produce a summary table below the data showing, for each client name in column B, the count of clean and flagged domains.

Full deliverability audit in one shot

Strip subdomain prefixes from all values in column A, run Neutrino host reputation on each, write the blacklist count in column B and flagged lists in column C, flag any domain with more than 2 hits as FLAGGED in column D, highlight FLAGGED rows red, and produce a sorted summary ranking clients by their highest blacklist count.

Try It

Get the 7-day free trial of SheetXAI and open your sender domain workbook, then ask SheetXAI to check column A against Neutrino host reputation before your next client deliverability review. See also the domain WHOIS investigation spoke if you need registration age and security flags alongside the blacklist data.

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