The Verisend SPF Fail List is an advisory list of messages received that failed SPF by people who use the Verisend email verification system. This is not a blacklist, because each Domain owner controls their own SPF. This list shows when our users get misconfigured SPF information and our correct reading says that this sender is not authorized to send mail on behalf of the Domain, which looks like phishing. To fix this problem, Domains need to fix their SPF records in DNS. We cannot fix these bad or incorrect SPF records. Only the Domain ownder can fix their own SPF record errors. Here is what Verisend mail recipients see when receiving an email from one of these listed IP addresses:
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