Simple script to generate a static mta-sts.txt file from your MX records and serve them via Cloudflare Pages.
- Create a new Cloudflare Pages application and link this repository
- As "Framework preset" select "none"
- As "Build command" enter
node generate.js - Leave "Build output directory" empty
- Define the following environment variables in the Cloudflare UI
| ENV VAR | Description |
|---|---|
DOMAIN |
Target domain |
MTA_STS_MODE |
This is the policy mode. Can be enforce, testing or none. (Default: testing) |
MTA_STS_MAX_AGE |
Indicates how long the sender should cache the policy (Default: 1209600) |
- Click "Save and Deploy"
- Under "Custom domains" click "Set up a custom domain" and add "mta-sts.[YOUR_DOMAIN]"
This script DOES NOT run a Cloudflare Worker, it just generates a static mta-sts.txt during deployment and serves it via Cloudflare Pages (or Github Pages), this has the following implications:
- PRO: It's cheap, because serving static pages on Cloudflare is always free. (Ideal when you are on the free plan)
- CON: It's static, so every time you change your MX records, you need to redeploy the Cloudflare Pages application