PowerMTA-STS by PowerDMARC is a hosted Mail Transfer Agent Strict Transport Security (MTA-STS) management service. PowerMTA-STS helps configure MTA-STS correctly to ensure secure email delivery. It addresses the issue of email interception before encryption by enforcing the use of secure connections for email transmission. PowerMTA-STS mitigates man-in-the-middle attacks and prevents attackers from rerouting emails to servers they control or causing STARTTLS queries to fail.
