How to do Cragislist email forwarding in Node.js (receive email to auto-generated email address and forward it)?

All I found was this SO question using Rails: Email Forwarding like Craigslist - Rails

I googled for a long time but could not find anything using Node.js.

I know this is not the typically accepted SO question, but I literally have no other recourse at this point.

Could you please point me to a resource I could use or some tutorial ? Or maybe you know yourself how to do this ?

EDIT: I ended up using Sendgrid.

Solution

In normal cases you have a mailserver that receives the email.

I strongly recommend that you do that, because there are so many things a competent smtp-server handle, that you don't want to re-implement yourself. The smtp-server can then call your program to handle the received mails.

If you really really want to implement a smtp-server for incoming mail in node.js, you can have a look at mailin. It was last updated in August 2017, but have some issues with 2048 bit DKIM keys and some other things.

I have not used it myself, but according to the description it does what you are asking for.