How often should blocklist checks be run?

The frequency of blocklist checks depends on your sending volume and risk tolerance. More frequent checks enable faster response to problems.

For most senders, daily checks provide reasonable coverage. This catches listings within 24 hours, limiting potential damage while keeping monitoring manageable.

High-volume senders should use continuous monitoring that checks hourly or more frequently. When you send millions of messages, even a few hours of blocked delivery creates significant problems.

Automated monitoring services handle frequency for you. They check continuously and alert immediately when listings appear. This removes the burden of manual checking.

After any significant campaign or infrastructure change, run immediate checks rather than waiting for scheduled scans.

Check often enough that problems are caught before they compound. The cost of monitoring is trivial compared to the cost of undetected listings.