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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


Validation 101: What is it and why should I care?

We’ve partnered with the inimitable Lauren Meyer, Mailjet’s global VP of delivery & head of operations, North America, to bring you a series of blogs about validation, one of the most misunderstood yet incredibly powerful tools in an email marketer’s toolbox. We’ll start with the basics. What is List Validation? In short, list validation can […]

How has DMARC adoption evolved since 2018? It’s…complicated.

Guess who’s back, back again? It’s Matthew Vernhout, director of privacy at 250ok, with an all-new DMARC report for 2019! Tell a friend. Yes, this year we’re looking at how DMARC adoption rates fluctuated between our first glance at them in 2018 for a number of industries as well as taking a peek at different […]

Email Mythbusters: If my list is opt-in, I should get zero complaints.

At this point, we sound like a broken record but we’re 250ok with that. We think confirmed opt-in, or double opt-in, practice is the most basic standard for marketers to implement. If you’re asking someone to take an action to confirm their interest, and they do it, you can be relatively sure they’re in this […]






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