Port 587….TCP
Submission of authenticated emesis by customers….
What is Port 587 for?…
Email. The protocol or service generally associated is SMTP submission….
Transport Protocol
TCP
Safety precautions
Recommended port for the, authenticated shipment with ▼TLS….
Should we open this port in the firewall?
Only if a service is actually needed the use it. Apply the principle of any privilege: limit the authorized sources, destinations and interfaces, and then log connections when relevant.
How do I check this port?
Test-NetConnection SERVER -Port 587Under Linux, you can use nc -vz SERVER 587.
Port/service associations are common conventions. An application can be configured on another port.