Bare Metal Mail Transport
Helgi Skjortnes
A mail transport setup on a bare metal server: Postfix tuned for high volume, Mautic for campaigns, and each tenant in its own container. I got port 25 opened with the host, set reverse DNS for every address in a /28 subnet, and set up SPF, DKIM and DMARC so the mail authenticates properly.
The handover was a written runbook covering deploys, adding a tenant, and what to check when deliverability drops.
Like this project
Posted Jun 9, 2026
Postfix and Mautic on a bare metal server: rDNS across a /28, SPF, DKIM and DMARC, one container per tenant, and a written runbook.
Likes
0
Views
4
