# MXToolbox: how AI models rank it, October 2026

GTM AI Recommendation Index, October 2026 Edition. Named in 32 judge labels across 2 categories by 12 of 14 models. Page: https://gtm-ai-index.com/vendors/mxtoolbox/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Email deliverability and testing tools | 5% | 4 | 10% | 31 |
| Email verification | 0% | 30 | 0% | 1 |

## What the models said for it

- "Best free option: Stack Google Postmaster Tools, Microsoft SNDS, Yahoo Sender Hub, MXToolbox, Mail Tester, AboutMyEmail, and Sender Hub." (GLM 4.7 FlashX, Email deliverability)
- "free monitoring stack with Google Postmaster Tools, Microsoft SNDS, MXToolbox, and Yahoo Sender Hub" (Perplexity Sonar, Email deliverability)
- "Start with free tools → Google Postmaster Tools + MXToolbox + Mail-Tester free tier" (Kimi K2, Email deliverability)
- "cross-reference results with free, reputable diagnostic tools like MXToolbox (for SPF, DKIM, DMARC, blacklist checks)" (Mistral Small, Email deliverability)

## And against it

- "MxToolbox is an infrastructure diagnostic tool, not a campaign email testing tool... best used only for specific DNS and infrastructure checks, not comprehensive campaign testing." (Claude Haiku 4.5, Email deliverability)
- "Free tools like Mail Tester and MxToolbox handle basic checks but lack the depth for production workflows." (Muse Glimmer 30B, Email deliverability)
- "lack depth for production-scale testing, inbox placement simulation, or ongoing monitoring" (Grok 4.1 Fast, Email deliverability)

## In its own words

What MXToolbox's own pages state, read 2026-10-05. Stated by the vendor, not checked by the index.

- Positioning: Check your DNS MX Records online (https://mxtoolbox.com/)
- For: email novice, professional, marketer or technician (https://mxtoolbox.com/c/products/msp)
- Price stated: Free $0/month; Delivery Center $129/month; Delivery Center Plus $399/month (https://mxtoolbox.com/c/products/msp)
- Starting price: 0/month (https://mxtoolbox.com/c/products/msp)
- Free plan or trial: Free MxToolBox Account — Get one (1) Free Monitor to alert you to Email Delivery Issues (https://mxtoolbox.com/c/products/msp)
- Integrations claimed: 6 (https://mxtoolbox.com/c/products/msp)

## What it publishes

Every page mxtoolbox.com exposes, read 2026-10-05: 905 addresses. By kind, pages and the last 90 days:

- blog: 834 pages, 47 in the last 90 days, latest 2026-10-02
- case study: 1 pages, 0 in the last 90 days, latest 2020-04-01
- conference or event: 1 pages, 0 in the last 90 days, latest 2016-10-01
- report or ebook: 2 pages, 0 in the last 90 days, latest undated
- comparison: 3 pages, 0 in the last 90 days, latest 2024-04-01
- template or tool: 3 pages, 0 in the last 90 days, latest 2018-12-01
- glossary or explainer: 19 pages, 0 in the last 90 days, latest 2019-08-01
- Recent: 2026-10-02 blog: Why email deliverability tools fail businesses https://blog.mxtoolbox.com/2026/10/02/why-email-deliverability-tools-fail-businesses
- Recent: 2026-10-02 blog: 08 https://blog.mxtoolbox.com/2006/08
- Recent: 2026-10-02 blog: 03 https://blog.mxtoolbox.com/2015/03
- Recent: 2026-10-02 blog: 12 https://blog.mxtoolbox.com/2014/12
- Recent: 2026-10-02 blog: 02 https://blog.mxtoolbox.com/2012/02
- Recent: 2026-10-02 blog: 04 https://blog.mxtoolbox.com/2011/04

## Record

- Method: https://gtm-ai-index.com/methodology/
- Raw judge labels and full responses: https://gtm-ai-index.com/data/
- License: CC BY 4.0. Cite as GTM AI Recommendation Index, October 2026 Edition, gtm-ai-index.com.