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

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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