Feature set
MXtoolbox, traditionally known for its extensive suite of free DNS and email diagnostic tools, integrates DMARC reporting into its broader 'Delivery Center' offering. This means we get a wide array of tools beyond just DMARC, such as general DNS lookup, SMTP testing, and adaptive blacklist monitoring. The DMARC capabilities provide detailed aggregate reports, helping us identify sending sources and their DMARC compliance status.
The platform focuses on monitoring email configurations like SPF and DKIM, offering deliverability diagnostics, and includes domain impersonation protection. For those already using MXtoolbox for other purposes, adding DMARC can feel like a natural extension, leveraging a familiar interface for multiple email-related tasks. It also features SPF flattening in its higher tier, a valuable tool for domains hitting the 10-lookup limit.
Sendmarc offers a DMARC-first approach, with its features meticulously built around achieving DMARC compliance and email security. Their platform provides comprehensive DMARC visibility, failure reports, and robust tools for configuring SPF, DKIM, and BIMI. We find their reporting to be granular, allowing us to pinpoint authentication issues and unauthorized senders effectively.
Beyond DMARC, Sendmarc includes critical components like MTA-STS and TLS-RPT reporting, which are essential for securing email transport. Their blocklist (or blacklist) and threat reporting are integrated, giving us a holistic view of potential issues. They also emphasize a managed service offering, suggesting a more hands-on approach from their team in guiding users through DMARC implementation and enforcement.