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block_me.js
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block_me.js
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// Plugin which registers mail received to a certain address
// and extracts a From: address from the mail and puts that address
// in the mail_from.blocklist file. You need to be running the
// mail_from.blocklist plugin for this to work fully.
var fs = require('fs');
var utils = require('./utils');
exports.hook_data = function (next, connection) {
// enable mail body parsing
connection.transaction.parse_body = 1;
next();
}
exports.hook_data_post = function (next, connection) {
if (!connection.relaying) {
return next();
}
var recip = (this.config.get('block_me.recipient') || '').toLowerCase();
var senders = this.config.get('block_me.senders', 'list');
var self = this;
// Make sure only 1 recipient
if (connection.transaction.rcpt_to.length != 1) {
return next();
}
// Check recipient is the right one
if (connection.transaction.rcpt_to[0].address().toLowerCase() != recip) {
return next();
}
// Check sender is in list
var sender = connection.transaction.mail_from.address();
if (!utils.in_array(sender, senders)) {
return next(DENY, "You are not allowed to block mail, " + sender);
}
// Now extract the "From" from the body...
var to_block = extract_from_line(connection.transaction.body);
if (!to_block) {
connection.logerror(this, "No sender found in email");
return next();
}
connection.loginfo(this, "Blocking new sender: " + to_block);
connection.transaction.notes.block_me = 1;
// add to mail_from.blocklist
fs.open('./config/mail_from.blocklist', 'a', function (err, fd) {
if (!err) {
fs.write(fd, to_block + "\n", null, 'UTF-8', function (err, written) {
fs.close(fd);
});
}
else {
connection.logerror(self, "Unable to append to mail_from.blocklist: " + err);
}
});
next();
}
exports.hook_queue = function (next, connection) {
if (connection.transaction.notes.block_me) {
// pretend we queued this mail
return next(OK);
}
next();
}
// Example: From: Site Tucano Gold <contato@tucanogold.com.br>
function extract_from_line(body) {
var matches = body.bodytext.match(/\bFrom:[^<\n]*<([^>\n]*)>/);
if (matches) {
return matches[1];
}
for (var i=0,l=body.children.length; i < l; i++) {
var from = extract_from_line(body.children[i]);
if (from) {
return from;
}
}
return null;
}