Episode 8 of 10
SPF, DKIM, DMARC: mail that arrives
Three records in your DNS decide whether your mail arrives: SPF names who may send for your domain, DKIM signs each message, DMARC tells the recipient what to do if one fails.
Check yourself
What does DMARC do?
SPF says which servers may send for your domain, and DKIM signs each message. DMARC tells the recipient what to do when one of them does not match.
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06 · Basic
Secure and resilient
Back-ups you can restore, access per person, NIS2 and ISO 27001 without panic.
After this series you can:
- You have a restore tested and record, per system, how much loss and downtime you accept.
- You give each role only the access it needs, and have someone test where an attacker gets in.
- You check whether NIS2 applies to you and record who does what in an outage or incident.