Domain and IP Blacklists

Blacklist listings can affect delivery when mailbox providers or gateways trust that list. Not every listing has the same impact.

Response sequence​

1. Identify the exact domain, IP, or URL listed.
2. Check whether recent sends caused bounces or complaints.
3. Pause risky traffic sources.
4. Fix list source, authentication, or content problems.
5. Request delisting only after the cause is fixed.

Do not request delisting repeatedly without changing the sending behavior that caused the listing.