Why “dmarc” is being discussed
The most recent Hacker News stories and comments contributing to this topic's mentions.
If you're using Gmail's “Send As” feature to use a different SMTP server for outgoing mail, then yes, you must have a proper DMARC TXT record configured on the domain you send f…
by MrDOS · Nov 9, 2026
DMARC does basically nothing. Certainly nothing that DKIM doesn't already do. Users just get phished by email that's not in their own company domain but something similar (or ev…
by InsidiousWombat · Nov 9, 2026
You said DMARC does not prevent email forgery. I simply corrected you on that and explained what DMARC does. Setting a DMARC policy that allows unsigned emails is easier than co…
by basilikum · Nov 9, 2026
That's what DMARC and DKIM can help with. If you have `p=reject` then anything failing your DKIM check will be rejected by the recipient mail server (if it supports DMARC)
by whh · Nov 9, 2026
> so tell me what benefits that has over having no dmarc record at all ? The the existence of a DMARC assertion record in the DNS changes how the MTA (the receiving system) asse…
by LeonM · Nov 9, 2026
And have Microsoft started checking DMARC correctly yet? We discovered when we set up a third-party to send via Amazon SES with one of our domains at the start of 2025 that Micr…
by KwanEsq · Nov 9, 2026
Interest
Proportion of Hacker News items mentioning "dmarc" over time.
Mentions
Total number of Hacker News items mentioning "dmarc" over time.