Port 5109VPOP3 Status
VPOP3 Mail Server is a Windows-based POP3/SMTP email server that provides businesses with internal and external email handling capabilities. Port 5109 is used for status and management communication between client tools, monitoring systems, and the server itself. It facilitates administrative tasks such as checking the health of the mail server, reviewing messages in queue, and managing configuration remotely..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 10,556
2 transports registered
payload readable on path
used by convention
caution
rank 414 of 993 · top 42%
Technical Details
what runs on :5109VPOP3 is a commercial mail server solution primarily designed for small to medium-sized businesses. It supports multiple mail protocols including POP3, SMTP, IMAP, and webmail access. Port 5109 is an unofficial port used by the VPOP3 service to expose status information or provide administrative control. Because it is utilized outside official mail delivery, this port is often employed for remote monitoring or in conjunction with client tools provided by the developer.
Typically, port 5109 allows client-side applications or administrator consoles to communicate with the server, receiving details about server health, user statuses, queues, and other operational metrics. This can include text-based status feeds, command responses, or JSON/XML encoded data. The service on this port may implement proprietary protocols rather than standardized messaging systems.
Given its nature, the port may not support encrypted connections by default and instead rely on network segregation or other external methods for security. Administrators might access it over internal trusted networks or via secure tunnels when remote management is required.
Security Information
exposure of :5109risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
email averages 3.9 across 42 ports — this one sits 0.1 above.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
unofficial
used by convention, not registered — what answers here varies by deployment
reachable over
tcp · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Unencrypted communications can expose sensitive server status data to eavesdroppers.
- If improperly secured, attackers may gain insights into the mail server's status, aiding enumeration and lateral attacks.
- Weak or absent authentication on the status port may allow unauthorized management actions or data retrieval.
Common Mitigations:
- Restrict access at the firewall level to trusted hosts or internal networks only.
- Employ VPNs or SSH tunnels for remote management over insecure networks.
- Enable strong authentication if the status interface supports it, or disable remote status entirely if unnecessary.
- Regularly update VPOP3 software to address any known vulnerabilities.
- Monitor and log all connections to port 5109 to detect suspicious activity.
Related Ports
the 8 most looked-up other ports in email — 42 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :143 | IMAP | TCPUDP | caution | 20.7k | |
| :995 | POP3S | TCPtls | caution | 18.8k | |
| :109 | POP2 | TCP | caution | 17.9k | |
| :2096 | cPanel SSL Webmail | TCPtls | Web Services | safe | 17.4k |
| :110 | POP3 | TCP | caution | 15.5k | |
| :993 | IMAPS | TCPtls | caution | 14.5k | |
| :1352 | Lotus Notes RPC | TCP | caution | 12.3k | |
| :24 | Private Mail | TCPUDP | caution | 11.7k |
risk mix of the 8 listed
- safe13%
- caution88%
3 of 8 encrypted