If your email is rejected by a mailbox provider and the error message directed you to Return Path, the following information may be helpful.

Today’s email filters are extremely sophisticated. Following email industry best practices is one way to improve your inbox placement, but best practices are not going to maximize your deliverability and optimize your revenue.

Return Path recommends following bulk sender guidelines while also monitoring reputation data, campaign-level filtering data, and individual-level filtering data at all major email providers and filtering companies.

To get started, we suggest the following:

  • Create an account.
  • If your Sender Score is below 70, you need to repair your sender reputation. Download the Hidden Metrics of Email Deliverability to understand the engagement-based metrics mailbox providers are using determine which senders get in the inbox.
  • If your Sender Score is above 70, continue following industry best practices and optimizing your email program. Download the Email Marketing Lookbook to learn how to build and run an effective email program.
  • If your Sender Score is above 80, you may qualify for our Certification program, the industry-leading whitelist. Learn more about the Return Path Certification program.

Featured Resources


2018 Email Marketing Lookbook

Learn More


Era of Optimization

Learn More


2017 Deliverability Benchmark Report

Learn More

We Know Email

We’re the experts in deliverability and driving results for your email marketing.

Request a Demo

Latest Email Optimization Posts

Top 17 Topics of 2017

Read More

Microsoft ‘Moves’ to Make Reporting Junk Email Easier

Read More

Need Some Suggestions to Improve Your Email Campaigns? [New research]

Read More

Stay up to date

Enter your email address below to subscribe to our mailing list.