Are SMTP ports unblocked for receiving?
petrpavlik
HOBBYOP
2 years ago
I'm trying to deploy a simple proxy server in node that accepts SMTP connections from emails, and proxies received email using a REST API. I might be absolutely doing something wrong, but are ports like 645 blocked for incoming connections by any chance?
1 Replies
2 years ago
All ports are blocked unless you open them via a TCP Proxy or a Domain via Target Ports.
https://docs.railway.app/reference/tcp-proxy
https://docs.railway.app/guides/public-networking#target-ports
With that said, you would not be able to run something that accepts traffic for email and an http service, since you can only expose a TCP port or a domain, not both at the same time.