All of the signals, under one roof.



Us Them
Proprietary spam trap network
Feedback Loop monitoring
Real-time blacklist monitoring
Spam trap monitoring product with activity-based alerting
Spam trap monitoring on shared IPs
Email, SMS, Slack, and HipChat Alerts
Organize IPs/domains into profiles

If it's meaningful to your reputation, you can monitor it in real time with 250ok.

Global Spam Trap Network

Tired of vague spam trap counts and lack of visibility? Us too. That's why we built our own trap network so we can offer a diverse set of data sources, collect and analyze millions of relevant messages per day, and deliver the value email marketers need to improve their program.


Complaint Monitoring

By collecting your feedback loop reports, we'll detect sudden increases in complaints that may cause deliverability issues, and help you suppress your most troublesome recipients.

Blacklist Alerts

Blacklistings can dramatically alter your ability to deliver mail to your customers. 250ok Blacklist was designed with speed and flexibility to notify you of issues before you send.

SNDS & Signal Spam

Integrate and automate your Microsoft SNDS & Signal Spam reporting to track spam traps and complaint rates at Outlook.com, Laposte, Sfr, and Orange.

Resources for #SeriousSenders


Deliverability 101: Monitoring Blacklists and Spam Traps

Email blacklists and spam traps aren’t new, so whether you’re an email veteran or just getting started, you have probably heard of blacklists. You may have even heard of spam traps. However, few people have a true understanding of what they actually are, how they work, or how a sender should monitor them. Join them: […]

Deliverability 101: What is an IP address?

After our exploration into DNS, IP addresses were mentioned several times and I started thinking, “Maybe I need to explain IP addresses in more detail.” So here we are. What are IP addresses? An Internet Protocol (IP) address is a number assigned to any device connected to the internet. When sending email, internet service providers […]

DMARC adoption rates very low across most industries.

This year, we made it a priority to analyze the adoption of Domain-based Message Authentication, Reporting & Conformance (DMARC) in industries using email as a key means of communication and business growth. We looked at the domains of the SaaS 1000, top law firms, nonprofit organizations (NPOs), higher education institutions, top Chinese brands, and e-retailers […]




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