Koltrix
Guides
Sending DMARC reports to another domain: the auth record
If your rua address lives on a different domain, receivers check an authorization record first. How the _report._dmarc record works and how to test it.
4 min read
DeliverabilityHow to read a DMARC aggregate report, line by line
DMARC aggregate reports are compressed XML that few people read. Walk through each element, what the counts mean, and how to spot spoofing quickly.
5 min read
DeliverabilityTLS-RPT: get told when inbound TLS fails
SMTP TLS Reporting (RFC 8460) sends you daily JSON summaries of failed TLS sessions. How to publish the record and read the reports that come back.
5 min read