I’ve developed a web store and deployed it on Railway. During development, I used NodeMailer to send emails — it would send order confirmations to both the customer and the admin.
But after deploying, NodeMailer stopped working. After searching online (and with ChatGPT), I found some people saying that Railway might be blocking NodeMailer.

So I want to know:

Is this true?

Does Railway actually block NodeMailer for security reasons?

Or do I just need to change my NodeMailer configuration to make it work on Railway?

Also, are there any alternatives or workarounds similar to NodeMailer? The free tier of NodeMailer is very generous, so I'm wondering if you developers can suggest something suitable, since I’m still new to this.