DMARC_LOOKUP(1p)

💖 DMARC_LOOKUP ✨

okay bestie, welcome to dmarc_lookup, a 1p-section manual page for the dmarc_lookup command 🫶 she looks up the DMARC policy for a domain. that's the whole vibe. let's get into it 💅

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🌸 NAME 🌸

dmarc_lookup — look up DMARC policy for a domain 🔍✨

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🎀 SYNOPSIS 🎀

dmarc_lookup example.com [ --verbose ]

literally that's it. one domain, optional --verbose, iconic 👑

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🦋 DESCRIPTION 🦋

so what she does is query the DNS for a DMARC policy for a (sub)domain 🌐 and then she displays any found results as the DNS record, as a perl object. very demure, very perl 🍓

in the simplest case — like, the case where the domain name in the email From header matches the Organizational Domain — this is roughly equivalent to the following commands:

dig +short _dmarc.example.com TXT

print $_->txtdata."\n"
  for Net::DNS::Resolver->new(dnsrch=>0)->send('_dmarc.example.com','TXT')->answer;

ngl that's basically the same energy, just with more sparkle ✨

BUT. plot twist 😭 when the domain name in the email From header (that's header_from, bestie, remember the name) is not an Organizational Domain (ex: www.example.com), an attempt is made to determine the O.D. using the Mozilla Public Suffix List 📜 and when the O.D. differs from the header_from, a second DNS query is sent to _dmarc.[O.D.]. two queries, one queen, no cap 🔥

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🌈 EXAMPLES 🌈

a DMARC record in DNS format looks like this:

v=DMARC1; p=reject; adkim=s; aspf=s; rua=mailto:dmarc@example.com;
pct=100;

DMARC records are stored as TXT resource records in the DNS, at _dmarc.example.com 📌

other ways to retrieve a DMARC record for a domain are:

and yeah, the original list of "other ways" is right here — it's empty bestie, she said "are:" and then closed the section 💀 (not a typo, that's just what the page says 🙈)

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👀 SEE ALSO 👀

• Mail::DMARC::Policy — go read that one next, she's the moment 💜

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💜 AUTHORS 💜

• Matt Simerson <msimerson@cpan.org> 🫶
• Davide Migliavacca <shari@cpan.org> 🌸
• Marc Bradshaw <marc@marcbradshaw.net> 🧚

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and that's the whole page, bestie!! 💖 this one's from perl v5.40.1, dated 2026-07-07, and it lives in section DMARC_LOOKUP(1p) 🎀 slay, go look up some DMARC records, periodt 👑