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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


How do I seed test my triggered email?

Transactional or otherwise triggered email messages are likely some of the most important messages your organization sends to your clients or users. The definition of “triggered email” can vary, but for the purpose of this article, I’m going to refer to any type of message sent outside of a large-scale, “batch-and-blast” deployment, as triggered mail. […]

Ask LB: When should I be seed testing?

Hey LB, Now that I’ve got access to a seedlist testing tool, when should I actually test my seedlist? Is it best to test before, after, or during sending? What are your tips for getting the most out of seedlist testing? Uncertainly yours, Dr. When Hi Dr. When, This is a great question, and the […]

Hit the slopes, not the spam folder.

250ok is headquartered in Indianapolis. Needless to say, we don’t do a lot of skiing in these parts. Luckily, we are sponsoring MediaPost’s Email Insider Summit in Deer Valley, Utah, on December 8-11, meaning we get to share our email expertise while enjoying the beautiful scenery—probably not at the same time, but you never know, […]






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