MailHeaderAnalyzer

Analyzes email headers offline: delivery chain with delays and TLS, SPF/DKIM/DMARC/ARC results with an origin check against trusted authserv-ids, DMARC alignment, Exchange Online hybrid classification (AuthAs, AuthMechanism, CrossTenant), Microsoft Defender/EOP verdicts (SCL, BCL, CAT), SpamAssassin, Rspamd and anomalies such as duplicate From line... More info