MxToolbox vs Validity Engage (2026): which should you pick?

Pick MxToolbox if

• Fits if you want to be told when your sending domain lands on a blacklist
• Works for teams that want DMARC, inbox placement and blacklists in one tool

Look elsewhere if

• Pricey if you are one person: the first paid plan is $129 a month
• Tight if you stay free, as it is weekly blacklist checks for 1 domain
• Tight if you want more domains, since both paid plans cover 5
• Watch out: managed services are not priced, and the page gives no billing basis

Pick Validity Engage if

• Fits if you send large volumes and need to see inbox placement
• Works for brands with a team watching sender reputation

Look elsewhere if

• Not for you if you want to buy online, as pricing is built to fit through sales
• Skip it if you want a free plan or trial, as none was found
• Watch out: the directory name is Validity Everest, but the vendor's pages call it Validity Engage
• Pricey if you are a small sender, as it is aimed at enterprise sending programs and priced through sales

MxToolbox

• The free plan monitors one domain, weekly; inbox placement and DMARC reports are paid.
• Both paid plans cover 5 domains; Plus raises the message volume, not the domain count.
• The page shows a monthly price and does not say whether it is billed monthly or annually.
• Managed services pricing is not listed.

Validity Engage

• Pricing is built to fit through sales; no plan prices were found on the pages read.
• The directory name is Validity Everest, but the vendor's pages now call the platform Validity Engage.
• Aimed at enterprise programs; a demo is the listed way to get started.
• No self-serve sign-up or free plan was found on the pages read.

MxToolbox

Inbox placement analysis

Checks a campaign for placement at inbox providers such as Google and Outlook.com and reviews it against Google, Microsoft and Yahoo bulk sender requirements.

Adaptive blacklist monitoring

Monitors sending IP addresses, including third-party senders, against more than 100 blacklists.

DMARC, SPF and DKIM management

Analysis and management tools for moving to a reject policy, adopting BIMI and watching compliance. SPF flattening is on the Plus plan.

Recipient complaints

Pulls feedback from Google Postmaster Tools, feedback loops and other complaint mechanisms.

Mailflow monitoring

Round-trip monitoring of sending and receiving latency with alerts based on thresholds.

Managed services

A done-for-you service covers inbox placement, blacklist monitoring, SPF/DKIM setup and DMARC enforcement.

Validity Engage

Inbox placement testing

Shows where a campaign lands across major mailbox providers, using the Validity Intelligence Network, with results split by IP and domain.

Sender reputation monitoring

Tracks Sender Score across IPs and domains so a drop can be seen before it turns into a placement problem.

Authentication monitoring

Checks SPF, DKIM and DMARC configuration and alignment across sending domains and flags when something breaks.

Blocklist monitoring

Alerts when an IP or domain is listed on a blocklist and gives guidance on the trigger and on getting removed.

Pre-send deliverability check

Runs before a campaign goes out and surfaces spam trap, reputation and authentication risks.

Provider-specific signals

Breaks placement and throttling signals out by mailbox provider such as Gmail, Yahoo and Office 365.

MxToolbox

• Free$0

  Blacklist monitoring, run weekly, for 1 domain.

• Delivery Center$129

  per month for 5 domains and 500,000 messages (billing basis not shown)

  30 inbox placement analyses a month, complaint reporting, DMARC reports, SPF/DKIM analysis, BIMI management, impersonation protection, mailflow monitoring.

• Delivery Center Plus$399

  per month for 5 domains and 5M messages (billing basis not shown)

  100 inbox placement analyses a month, plus advanced delivery threat tools and SPF flattening on top of Delivery Center.

Validity Engage

Pricing could not be confirmed. See validity.com.