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Get advanced analytics on everything email.


All of the signals

A single email management platform

Build a customized email management solution.


World-Class Deliverability

Emails that don't reach the inbox are simply wasted opportunities. 250ok tracks every aspect of your email program to ensure that your messages reach your customers.

Expert Services and Support

You won't find any junior-level script readers here. Ask for examples of deliverability issues 250ok diagnosed, triaged, and quickly resolved after other competitors failed.

Complete Customization

Live outside the app with custom email, SMS, Slack, HipChat, PagerDuty, and webhook alerts. Set it and forget it. Focus on what matters to you, free of pointless notifications.

The 250ok Difference:



Us Them
International seed coverage at 100+ mailbox providers
Design integration with Litmus & Email on Acid
Integrated with major email service providers
Spam trap & phishing monitoring with alerts
In-house DMARC monitoring & guidance
Custom Email, SMS, Slack, and HipChat alerts
Compare performance across any campaign, device, or client
Full API or white label integration

Resources for #SeriousSenders


More than 90% of US and UK nonprofits and their email recipients are highly susceptible to fraud.

The latest installment in 250ok’s Domain-based Message Authentication, Reporting & Conformance (DMARC) adoption reports brings us some truly shocking and disturbing findings: Nearly 95% of US-based nonprofit organizations (NPOs) have no DMARC policy to protect their email recipients from fraud. We also analyzed UK-based NPOs and found they fared only marginally better, with almost 93% […]

Free your July 4th marketing emails from bad design!

We want YOU to send better marketing emails for your Fourth of July sales. Why? Because what’s more American than driving holiday revenue? Thus, we are back again with more help from MailCharts to bring you a 2017 look-back to inform your 2018 campaigns. Together we looked at 1007 emails mentioning variants of “July 4th” […]

The new email authentication frontier: Brand Indicators for Message Identification (BIMI).

Over the last decade or so, marketers have been hard at work implementing Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM), and many have started down the road of implementing Domain-based Message Authentication, Reporting and Conformance (DMARC). But we never sleep on email, so we’re excited by the prospect of an additional frontier of […]






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