Port 143 - Port Encyclopedia Reference
Port 143 reference for Port Encyclopedia. Check meaning, syntax, common usage, related standards, and practical implementation notes.
What Port 143 is used for
Port 143 is commonly associated with IMAP mailbox synchronization. The number alone is not enough for diagnosis. Check the protocol, direction, listening process, and network boundary together.
The main risk for this port is unencrypted mail access when STARTTLS is missing or stripped. In production, first decide whether the service should exist, then match firewall rules, ingress routing, security groups, and service configuration against the same evidence.
Practical check: require STARTTLS or move users to IMAPS on port 993. Port 110 and Port 443 may belong to different service families, so do not close every port scan finding with the same generic fix.
Port 143 should be reviewed with the actual listener, protocol, owner, and exposure path in front of you. The same number can mean a local development service, a private backend dependency, or a public production endpoint.
Close the finding only after the intended clients, firewall rules, logs, and rollback path are documented. A port page is useful when it turns a scan result into a concrete operational decision.
Port checklist
- Port 143 has a confirmed TCP, UDP, or dual-protocol requirement.
- The listening process and container are mapped to a service owner.
- Firewall, ingress, and cloud security rules point to the same intended target.
- External exposure includes TLS, authentication, and logging where needed.
Example searches
- imap port 143 starttls
- is Port 143 secure
- Port 143 firewall
- what service uses Port 143
Best used for
- Checking whether Port 143 matches the exact task, format, or problem you need to solve.
- Finding the closest WebRecast This reference category for a specific tool, reference, guide, or troubleshooting path.
- Choosing the next action: format, validate, convert, compare, explain, inspect, or debug.
- Checking privacy-friendly browser options before pasting files, text, tokens, URLs, or technical data.
