250ok BLACKLIST

Know if you're blacklisted before hitting send.

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Blacklisted sending IPs or domains can dramatically alter your ability to deliver mail to your customers.

Receiving networks (ISPs, hosting and filtering companies) often use third-party blacklists to reject and filter email. That's why 25ok Blacklist was designed with the flexibility and speed to notify you of listings as soon as possible. You can set up any combination of SMS or email notifications to instantly notify you when an issue occurs. Our global blacklist coverage includes Spamhaus, SURBL, SORBS, and more.


Segment your IPs & domains.

25ok Blacklist enables you to organize IPs, domains, CIDR entries, or range designations into segmented monitoring profiles. While transactional and marketing profiles offer preselected blacklists and checking schedules, you can customize which lists to monitor and how frequently you want to monitor them.

Monitor blacklists in real-time for continuous deliverability.


Fast Notifications

Our reporting engine was designed to ensure the quickest and most relevant notifications possible to reduce the loss caused by blacklists.


Flexible Monitoring

Enjoy the flexibility of selecting which blacklists you wish to monitor against and specifying the frequency of blacklist checking.


Segmented Profiles

Our intuitive profiling interface allows you to easily upload and organize your IP addresses and domains into segmented monitoring profiles.


Are you a #SeriousSender?