IP Whitelist, Unblock & Delisting Directory

Use when Exchange Online or Microsoft 365 rejects a sending IP and the NDR directs you to the delist portal.

Monitor Outlook.com/Hotmail IP reputation, complaint indicators, traffic and trap signals.

Enroll sending IPs in the Junk Mail Reporting Program to receive complaint samples.

Review Gmail domain/IP reputation, spam rate, authentication and delivery errors.

Check current Gmail sender requirements before escalating a delivery problem.

Submit a bulk-sender delivery issue after correcting authentication, complaints, list quality and traffic problems.

Start here for Yahoo/AOL sender requirements, troubleshooting and support resources.

Request review for persistent Yahoo/AOL delivery problems after correcting the root cause.

Register DKIM domains for Yahoo complaint feedback-loop reports.

Review Comcast error codes, sender requirements and blocked-IP guidance.

Check or request a reputation reset when a bounce explicitly references Cloudmark CSI.

Check IPs and domains across Spamhaus lists and follow the listing-specific remediation path.

Check IP and domain reputation in the Barracuda Reputation System.

Request an IP reputation adjustment only after the cause has been fixed.

Check Abusix Mail Intelligence listings and use its guided self-service delisting flow.

Check the SpamCop Blocking List. Listings normally expire automatically after reports stop.

Check the IP and follow the appropriate automated or manual removal process.

Check individual, network and ASN-level UCEPROTECT listings; review impact before taking action.

Request review when a bounce or lookup specifically identifies an Invaluement list.

Check Proofpoint IP reputation and follow the displayed remediation instructions.

Review email and web reputation associated with an IP, domain or network.

Check Trend Micro sender reputation and submit a request when eligible.

Fast multi-RBL diagnostic check. Always complete removal on the list owner’s official site.

Broad DNSBL comparison that links to individual list information and removal instructions.

Secondary multi-list check for confirming whether a reported listing is still visible.