Given you want to send mail to foo.com whose mx record is mail.foo.com whose IP is 1.2.3.4

Then write this entry in hosts file:
1.2.3.4  foo.com

Which should work for sending mail.

Regards

On 2024-07-15 21:00, Adam Weremczuk wrote:
What I need to configure for my Debian 12 VM:
- no public or LAN DNS whatsoever
- ability to fetch a single MX record for a single domain

I don't think I can add MX to /etc/hosts which only works for A records.

I'm after a similarly simple, "one liner" solution.

---
Adam

--
Jeff Pang
jeffp...@aol.com

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