I misspoke on DKIM records. They're DNS records for specifying the public key, but they're cryptographic keys used to sign and verify message integrity, and they do require more work than SPF.
Note *also* that for Google mail recipients, and you are sending from your own systems, you need to make sure the **Forward DNS, the Reverse DNS, and the hostname your mail server identifies as** should match, otherwise Google may flag your mail server as misconfigured and reject even with SPF and DKIM records set up.
Thomas
On 2025-09-09 21:03, Thomas Ward via Mailman-users wrote:
SPF is a DNS record, as are DKIM records, there's numerous guides out there to create/configure both. It'll partly depend on your mail system and how it routes mail through what MTA, etc.
I am not affiliated with any of these blogs:
"How to Set Up an SPF Record in 5 Simple Steps" - https://www.validity.com/blog/how-to-build-your-spf-record-in-5-simple-steps...
Cloudflare has a nice explanation of DKIM records - https://www.cloudflare.com/learning/dns/dns-records/dns-dkim-record/
These instructions should still work for doing the DKIM setup on a Postfix mailer - https://easydmarc.com/blog/how-to-configure-dkim-opendkim-with-postfix/
If you use a third party sender and not an on-prem Postfix or such then the configuration gets more difficult, complex, or custom.
Thomas
On 2025-09-09 20:56, jkoral@luc.edu wrote:
Thank you for the reply. Are there a good set of instructions for setting up SPF and DKIM?
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