app.js

const SMTPServer = require("smtp-server").SMTPServer;
const parser = require("mailparser").simpleParser

const server = new SMTPServer({
  onData(stream, session, callback) {
    parser(stream, {}, (err, parsed) => {
      if (err)
        console.log("Error:" , err)
      
      console.log(parsed)
      stream.on("end", callback)
    })
    
  },
  disabledCommands: ['AUTH']
});

server.listen(25, "192.168.30.100")

Hey, I've got this:

Any idea?

This is probably because the account you are running node with does not have root permission. Any port below 1024, in this case port 25 can only be used by an application that is started by an elevated user. Simon

…

On 17 Nov 2020, at 16:44, Duc Le ***@***.***> wrote: @ducdev commented on this gist. Hey, I've got this: <https://user-images.githubusercontent.com/3524016/99419469-bbbea500-292e-11eb-8646-2fa246ee6aa8.png> Any idea? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/bb25d0cd410bf5d24fe3ea48268f2ed8#gistcomment-3530608>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AALH6TVX34O3HDLJKZLBPQLSQKR5RANCNFSM4TY2EGEQ>.

To help you out further the following answer on Stack overflow should sort you out. https://stackoverflow.com/a/27096568/501827 <https://stackoverflow.com/a/27096568/501827> Simon

…

On 17 Nov 2020, at 16:44, Duc Le ***@***.***> wrote: @ducdev commented on this gist. Hey, I've got this: <https://user-images.githubusercontent.com/3524016/99419469-bbbea500-292e-11eb-8646-2fa246ee6aa8.png> Any idea? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/bb25d0cd410bf5d24fe3ea48268f2ed8#gistcomment-3530608>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AALH6TVX34O3HDLJKZLBPQLSQKR5RANCNFSM4TY2EGEQ>.

Amazing, I add the sudo and it works. Now I understand the issue is about lacking root permission. Thanks for your super quick reply.

I'm building my own disposable mail service, your guide made my day!