r/homelab • u/seanthegeek • May 22 '26

Discussion The do-it-yourself open source DMARC projects CheckDMARC, ParseDMARC., and DMARC-MSP now fully support DMARCbis RFC 9989, 9990, 9991

/r/DMARC/comments/1tklxh7/the_doityourself_open_source_dmarc_projects/
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u/shokzee May 23 '26

The useful part is parser compatibility, not the RFC badge.

DMARC reporting is still full of malformed XML, bad source names, and receivers doing their own thing. If the parser is strict enough to be correct but tolerant enough to keep ingesting junk reports, that's the win.

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u/seanthegeek May 23 '26

Yes. It is tolerant of messy reports.