diff --git a/application/config.js b/application/config.js
deleted file mode 100644
index c061895..0000000
--- a/application/config.js
+++ /dev/null
@@ -1,48 +0,0 @@
-// Note: Also update app.json and README.md!
-
-const config = {
-	email: {
-		domains: process.env.DOMAINS,
-		deleteMailsOlderThanDays: process.env.DELETE_MAILS_OLDER_THAN_DAYS
-	},
-	imap: {
-		user: process.env.IMAP_USER,
-		password: process.env.IMAP_PASSWORD,
-		host: process.env.IMAP_SERVER,
-		port: 993,
-		tls: true,
-		authTimeout: 3000,
-		refreshIntervalSeconds: process.env.IMAP_REFRESH_INTERVAL_SECONDS
-	},
-	http: {port: normalizePort(process.env.PORT || '3000')}
-}
-
-if (!config.imap.user || !config.imap.password || !config.imap.host) {
-	throw new Error('IMAP is not configured. Use IMAP_* ENV vars.')
-}
-
-if (!config.email.domains) {
-	throw new Error('DOMAINS is not configured. Use ENV vars.')
-}
-
-/**
- * Normalize a port into a number, string, or false.
- */
-
-function normalizePort(val) {
-	const port = parseInt(val, 10)
-
-	if (isNaN(port)) {
-		// Named pipe
-		return val
-	}
-
-	if (port >= 0) {
-		// Port number
-		return port
-	}
-
-	return false
-}
-
-module.exports = config