Overview

The Spamhaus Block List (SBL) is a list used for IPs that were found sending spam, snowshoe spamming or possibly bulletproof hosting.

Impacts

This listing occurs on the IP level. Delivery will more than likely be rejected and can also cause deliverability issues. 

Mitigation Process

To better understand the potential problems that caused the listing, review the SBL website. Once you have reviewed, you should then:

1. Find and correct the root cause of the listing.
2. Contact Mailgun and provide details on root cause and what was done to resolve. Mailgun will then start the removal request.

It is important that the issue be resolved prior to contacting Mailgun. Being honest and transparent will get you to a solution faster. Spamhaus is straightforward on what they want to know. If Spamhaus detects that a problem is ongoing they will not remove the block.

Need Support?

Our Support Team here at Sinch Mailgun is happy to help! Reach out to us in the Support page of your Mailgun Control Panel, and we'll be with you shortly!