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When you manage your domains through Fastmail it does it automatically. I certainly haven't had to configure it myself. There is a neat website to check your e
by climb_stealth 5y ago
When you manage your domains through Fastmail it does it automatically. I certainly haven't had to configure it myself.
There is a neat website to check your email settings that was on the HN front page earlier this year:
https://www.learndmarc.com/ https://www.learndmarc.com/
- janto 5y agoAmusing :) Although I have to admit that I am even less sure after using that site. There doesn't seem to be an indication that DKIM "FAIL" in red is a good or bad thing after it attempted to spoof a domain I own. I assume it's good?
- freddieleeman 5y agoA spoofed message should FAIL DMARC. It could PASS DKIM and if the signature came from a domain that is owned by the attacker. But DMARC will fail when the DKIM domain and the HEADER.FROM domain do not align. Please read my blog here: https://www.uriports.com/blog/introduction-to-spf-dkim-and-dmarc/ https://www.uriports.com/blog/introduction-to-spf-dkim-and-d... It will explain how SPF, DKIM, and DMARC work together to prevent spam.
- climb_stealth 5y agoNot sure, I can't say I'm super familiar with this. Which I guess is part of the reason I'm having it configured through Fastmail. This is the original submission where the link came from if it helps: https://news.ycombinator.com/item?id=29869266 https://news.ycombinator.com/item?id=29869266