Two More Major Mailbox Providers Launch Feedback Loops

Return Path is pleased to welcome two more prominent mailbox providers, Norway’s Telenor and the Netherlands’ XS4ALL, into our network of partners calling on our experience and expertise to launch public feedback loops. Their initiatives will help email senders around the world to improve their subscriber experience and their marketing performance by notifying them when Telenor and XS4ALL users report their messages as spam.

By immediately removing these subscribers from their lists, email marketers can prevent damage to their sending reputations—and their ability to reach Telenor and XS4ALL inboxes—while ensuring that their audiences include only people who want to receive their messages. Feedback loops are strongly recommended as best practices by international email policy bodies including M3AWWG, ETIS, and the Return Path Certification program.

Like other mailbox providers offering feedback loops to senders, Telenor and XS4ALL can refuse access to those with poor reputations or to those that continue to mail to users who complain. Also, to protect subscribers’ privacy, feedback loop messages do not include clear text identification of users’ addresses.

For more information on Telenor’s feedback loop, click here. For more information on XS4ALL’s feedback loop click here.

minute read

Popular stories



BriteVerify email verification ensures that an email address actually exists in real-time


The #1 global data quality tool used by thousands of Salesforce admins


Insights and deliverability guidance from the only all-in-one email marketing solution

GridBuddy Cloud

Transform how you interact with your data through the versatility of grids.

Return Path

World-class deliverability applications to optimize email marketing programs

Trust Assessments

A revolutionary new solution for assessing Salesforce data quality


Validity for Email

Increase inbox placement and maximize subscriber reach with clean and actionable data

Validity for Data Management

Simplify data management with solutions that improve data quality and increase CRM adoption

Validity for Sales Productivity

Give your sales team back hours per day with tools designed to increase productivity and mitigate pipeline risks in real-time