This article covers how the URIBL Greylist affects email deliverability for emails sent from Keap™, including what the URIBL Greylist is, how greylisting differs from blacklisting, and what the greylisted status of the Keap sending domain means for email delivery. This article does not cover how to improve individual account deliverability. For help with email deliverability best practices, see email deliverability best practices in Keap.

How the URIBL Greylist Affects Email Delivery From Keap

SpamAssassin is a widely used email spam filtering tool that relies on a third-party service called URIBL (URI Blacklist) to evaluate the reputation of hyperlinks included in email messages. URIBL is a domain-based reputation list that is independently operated and not affiliated with Keap.

URIBL maintains three types of lists — white, grey, and black. The impact of each list type on email delivery differs significantly. URIBL blacklistings have the greatest impact on deliverability because the blacklist is enabled by default among most email administrators. URIBL greylistings, by contrast, are not enabled by default and have minimal impact on senders. The infusionsoft.com sending domain used by Keap is currently greylisted on URIBL — a status that is standard and expected for most bulk email sending platforms.

When a hyperlink in an email is included on the URIBL Greylist, the impact on deliverability is minimal for most recipients. However, a small number of ISPs (Internet Service Providers) and ESPs (Email Service Providers) that have manually enabled URIBL greylist blocking may block or filter emails that contain greylisted links. This affects only a small subset of recipients whose email providers have chosen to enable greylist blocking.

Do not submit requests to de-list the infusionsoft.com domain from the URIBL Greylist. The greylisted status of the infusionsoft.com domain is normal and expected for bulk email sending platforms. Submitting de-listing requests is not necessary and will not improve deliverability.

The most effective way to maintain and improve email deliverability is to follow CAN-SPAM Act compliant email marketing practices — specifically, sending only to opted-in contacts and removing unused or abandoned email addresses from mailing lists regularly. The URIBL greylist status of the sending domain is related to emails sent to unused and abandoned email addresses. Maintaining a clean, engaged contact list reduces the impact of any greylist status on overall deliverability.

Email Deliverability on the Keap Network

Keap maintains a high-performance email sending infrastructure designed to maximize deliverability for permission-based email marketing. The Keap email infrastructure is DKIM and SPF compliant — two authentication standards that help receiving email servers verify that emails sent from Keap are legitimate. A dedicated compliance and abuse monitoring team actively monitors sending reputation and responds to abuse and compliance issues to maintain the Keap network's standing with email providers. Confirmed opted-in email addresses consistently experience higher deliverability rates than unverified lists.

Frequently Asked Questions

What does this article cover?

This article covers how the URIBL Greylist affects email deliverability for emails sent from Keap, including what the URIBL Greylist is, how greylisting differs from blacklisting, and what the greylisted status of the Keap sending domain means for email delivery. For help with email deliverability best practices, see email deliverability best practices in Keap.

What is the URIBL Greylist?

The URIBL Greylist is one of three domain reputation lists maintained by URIBL — an independently operated domain-based reputation service used by SpamAssassin and other spam filtering tools to evaluate the reputation of hyperlinks in email messages. The three URIBL lists are white (trusted), grey (minimal concern), and black (high risk). Greylist status has minimal impact on deliverability because the greylist is not enabled by default in most email filtering configurations.

Will the URIBL Greylist status affect my email deliverability in Keap?

For most recipients, the URIBL Greylist status of the infusionsoft.com sending domain has minimal impact on email deliverability. A small number of ISPs and ESPs that have manually enabled URIBL greylist blocking may filter or block emails containing greylisted links. The best way to minimize the impact of any greylist status is to send only to opted-in contacts and maintain a clean, engaged contact list.

Should I request that the infusionsoft.com domain be removed from the URIBL Greylist?

No. The greylisted status of the infusionsoft.com domain is normal and expected for bulk email sending platforms. Do not submit de-listing requests to URIBL for this domain. The greylisted status does not require remediation and submitting de-listing requests will not improve deliverability.

What can I do to improve email deliverability from my Keap account?

The most effective way to improve email deliverability is to follow CAN-SPAM Act compliant email marketing practices — send only to contacts who have explicitly opted in to receive email communications, remove unused and abandoned email addresses from mailing lists regularly, and avoid sending to unengaged contacts. Confirmed opted-in contacts consistently experience higher deliverability rates. For a full guide to email deliverability best practices in Keap, see email deliverability best practices in Keap.