Case Study: International Exchange Company strengthens email security and blocks unauthorized senders with Red Sift OnDMARC

OnDMARC simplifies the complexities of SPF for an international exchange company

International Exchange Company, a U.S. non-profit organization that manages exchange visitor programs for the government, was sending more than 3 million emails a year and struggling with SPF complexity, lookup limits, and limited guidance from its existing DMARC reporting tool. With multiple email services in use, the team needed a way to identify all senders, verify alignment, and uncover shadow IT without disrupting legitimate mail. Red Sift’s OnDMARC was introduced to help address these email authentication challenges.

Using Red Sift’s OnDMARC, including Dynamic SPF and Investigate, the team quickly simplified management of 20+ SPF entries, validated configurations, and gained visibility into authorized and unauthorized senders. The organization discovered nearly 7,000 unauthorized senders, blocked over 300,000 illegitimate emails in one summer, and saw fake mail account for 68% of messages in a 30-day report. After moving to p=reject, it reduced unauthorized services by 36% in one month and continued strengthening its email security posture.