Great Presentation = Happier Customers

As new devices and applications are constantly introduced, it's increasingly difficult to ensure consistent design and user experience across your campaigns.

Ensure Quality

You've spent countless hours assembling your creative. 250ok Design helps you ensure that it's presented to your customers in the way you envisioned. Effective, optimized communication means highly engaged recipients.

Fix Broken Images & Links

Large file sizes, broken images or links, and invalid markup are just a few issues we'll help you fix. 250ok's optimization engine provides actionable feedback and suggestions on how to optimize your campaign for success.

Test Common Spam Filters

250ok Design tests your creative against common spam filters including Barracuda, Symantec, Spam Assassin, Outlook, and many more so you can identify and fix spam triggers before deploying your campaign.

250ok works with any email service provider

MailChimp Salesforce Act-On Marketo Adobe SendGrid Maropost SparkPost

How email previewing works:


Test any campaign or template

You can easily create a test by importing templates from your email service provider or by uploading your campaign's HTML.


We'll capture the screenshots

Using the industry's leading rendering providers – Litmus and Email on Acid - we'll capture email previews in more than 70 clients and devices.


Review the results

Identify issues before you send by combining your email previews and spam filter results alongside 250ok's world-class deliverability tools.

Resources for #SeriousSenders

Wish you could Send with Confidence? Say no more.

Our partner (and dear friend) SendGrid is in the midst of a very cool undertaking; their international Send with Confidence Tour. We’re pumped to support them on the next stop: New York City, May 17! We’ll be sending our Swiss army knife of deliverability, Tim Moore, VP of customer solutions, to participate in a chat […]

250ok & SparkPost are offering a FREE GDPR-focused webinar!

We’ve been watching and preparing for the General Data Protection Regulation (GDPR) for years. Now we are in the final stretch before it goes into effect on May 25, 2018. As we watch the clock tick down to go-time, are you prepared to adhere to all the regulations in place to stay compliant and to […]

Our Global Benchmark Report Reveals Email Deliverability is Improving

We love email. Like…a lot. So much so that we reviewed the historical reporting of nearly 1 million seed-based tests, using seed data within the 250ok Inbox tools and campaigns sent between 2016 and 2017, to illustrate email deliverability to our clients’ most important geographical regions. For newer senders who are unfamiliar with seed-based inbox […]

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