- Can I run my Mail-in-a-Box at home?
- No. Computers on most residential networks are blocked from sending mail both on the sending end (e.g. your ISP blocking port 25) and on the receiving end (by blacklists) because residential computers are all too often hijacked to send spam. Your home IP address is also probably dynamic and lacks configurable “reverse DNS.” If any of these apply to you, you’ll need to use a virtual machine in the cloud.
- ss -lntu
nmap --script smtp-open-relay server.nila.com