Change email subject

Technical Support
  • I know that one can mess around with the email templates, but I see no way to change the subject of the email.

    [sitename #topic_id] topic_name

    I need to include the topic id in the subject because I need to parse the subject ( postfix forward pointing to a Yii console controller, if you must know) - do I need to mess around in the source code?

    I am implementing reply by email, btw.
    And since I am a PHP developer, I am using the api and dirty tricks πŸ˜‰

  • I also do know that I can grab the topic id from the URL - that thought came to me just now πŸ˜› - but it is easier to just regex the subject.

  • Emailer fires:

    Plugins.fireHook('filter:email.modify', data, next);

    Listen to that hook, modify subject in data, voila.

  • /* puts nodejs on list of stuff to learn .. */

    Ok, I will perhaps try and look into that πŸ˜‰

  • I just did a stupidly simple (stupid?) plugin but it does not seem to do much πŸ™‚

    (function(module) {
        "use strict";
        var autoreplyit = {};
        autoreplyit.filter = function(data) {
            data.subject = data.subject + ' #' +;
        module.exports = autoreplyit;
        "id": "nodebb-plugin-autoreplyit",
        "name": "NodeBB Autoreply email subject changer",
        "description": "NodeBB Plugin that changes the email subject field to include the topic id.",
        "url": "",
        "library": "./library.js",
        "hooks": [
            { "hook": "filter:email.modify", "method": "filter" }
  • Check to see that autoreplyit.filter is executed (maybe a console.log?)

    Your filter will need a callback:

    autoreplyit.filter = function(data, callback) {
      data.subject = data.subject + ' #' +;
      callback(null, data);
  • It works πŸ™‚

    (function(module) {
        "use strict";
        var autoreplyit = {};
        autoreplyit.filter = function(data, callback) {
            var re = /http:\/\/nodebbjacmoe-jacmoe\.rhcloud\.com\/topic\/(\d+)/;
            var str = data.plaintext;
            var found = str.match(re);
            data.subject = data.subject + ' #' + found[1];
            callback(null, data);
        module.exports = autoreplyit;

    Totally hard-coded, of course πŸ˜›

    I am fully aware that it is only a matter of time before a kind soul points out to me that I can easily get the site url from a dark corner of the API - but, hey: it works.
    Now the receiving PHP script can grab the topic id and make sure that it is sent to the right place.

  • Thanks a lot @julian πŸ™‚

  • @Jacob-Moen Hey, if it works, it works!

    Now you've written a NodeBB plugin πŸ˜„

  • I threw in an if(found) just in case - but I am always amazed by how little code is required.
    That seem to happen a lot with Node.js and a well written software entitled NodeBB πŸ‘

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    @the-cat-gaming-099 I don't believe this is possible because of how NodeBB is written. You need email to reset password, receive notifs, and for the database and core to see the users.
    I suppose it could be possible, but you'd have to modify core yourself and it'd be pretty complicated and to be honest, not worth it.

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