Plugin to block RCPT_TO addresses in a list.

config/rcpt_to.blocklist

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+# This is a blocklist for the rcpt_to line. One address per line.

docs/plugins/rcpt_to.blocklist.md

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+rcpt_to.blocklist
+===================
+
+This mail blocks RCPT_TO addresses in a list.
+
+Configuration
+-------------
+
+* rcpt_to.blocklist
+
+  Contains a list of email addresses to block.

plugins/rcpt_to.blocklist.js

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+// Block mail from matching anything in the list
+var utils = require('./utils');
+
+exports.hook_rcpt = function (next, connection, params) {
+    var rcpt_to = params[0].address();
+    var list = this.config.get('rcpt_to.blocklist', 'list');
+    if (utils.in_array(rcpt_to, list)) {
+        return next(DENY, "Mail to " + rcpt_to + "is not allowed here");
+    }
+    return next();
+}