# Postfix on Kubernetes: A Step-by-Step Email Guide

DevFeed: [Postfix on Kubernetes: A Step-by-Step Email Guide](<https://devfeed.tech/articles/postfix-on-kubernetes-a-step-by-step-email-guide-28524.md>)

Original publisher: [Read original article](<https://blog.risingstack.com/postfix-on-kubernetes-a-step-by-step-email-guide/>)

Author: RisingStack Engineering

Published: 2025-09-25T04:12:00Z

Content type: tutorial

Language: en

Sources: [RisingStack](<https://devfeed.tech/sources/risingstack.md>)

Topics: [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>), [email](<https://devfeed.tech/topics/email.md>), [Authorization](<https://devfeed.tech/topics/authorization.md>)

Tags: [authentication](<https://devfeed.tech/tags/authentication.md>), [email](<https://devfeed.tech/tags/email.md>), [guide](<https://devfeed.tech/tags/guide.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [postfix](<https://devfeed.tech/tags/postfix.md>), [spoofing](<https://devfeed.tech/tags/spoofing.md>)

## AI overview

A step-by-step guide to running a Postfix email server on Kubernetes. It explains the infrastructure and email-authentication requirements, including a fixed outbound IP address, a domain, PTR and SPF records, and DKIM and DMARC configuration.

## Source excerpt

You are in the process of putting together your application. While designing your authorization solution, you realize you will need to send emails to potential clients.Using a third-party service (like SendGrid or Mailgun) to cover your needs for now looks pretty attractive. After all, you don't have any users yet, they offer free tiers, and [...] The post Postfix on Kubernetes: A Step-by-Step Email Guide appeared first on RisingStack Engineering.