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Port 7025Zimbra LMTP

Port 7025 is primarily used by Zimbra Collaboration Suite's LMTP (Local Mail Transfer Protocol) service for internal mail delivery within the Zimbra server environment. It facilitates the transfer of email messages between the mailbox server and other components handling incoming emails, ensuring reliable and efficient local message distribution..

inEmailSystem
transport
tcp

single transport

in transit
cleartext

payload readable on path

assignment
unofficial

used by convention

risk
4/10

caution

lookups
11,376

rank 363 of 993 · top 36%

Technical Details

what runs on :7025

Port 7025 is utilized by the Zimbra Collaboration Suite, a popular open-source messaging and collaboration platform. Specifically, it provides the LMTP (Local Mail Transfer Protocol) service, which is used internally to deliver email messages from the Mail Transfer Agent (MTA) and other services to individual mailbox storage on the Zimbra server.

Using LMTP, emails are transmitted efficiently with support for per-recipient delivery status, enabling the system to manage message routing, error handling, and storage more granularly. Unlike SMTP, LMTP is designed as a lightweight protocol optimized for local server communication, emphasizing simplicity and speed in internal message delivery.

Typically, port 7025 is not exposed externally; it operates within the Zimbra environment, facilitating reliable handling of inbound messages post-initial receipt via SMTP. This specialization streamlines mail processing internally, allowing Zimbra to coordinate email distribution and storage effectively.

Security Information

exposure of :7025

risk 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

every listening transport is another surface to filter at the edge

security overview

Common Vulnerabilities:

  • Since port 7025 generally operates internally, risks arise if the port is inadvertently exposed to untrusted networks.
  • Vulnerabilities may include unauthorized access if firewalls or network segmentation are misconfigured, potentially allowing attackers to inject or intercept email messages.
  • Zimbra-specific vulnerabilities, arising from software bugs or outdated versions, can be exploited to gain further access or disrupt email delivery processes.

Mitigations:

  • Restrict access to port 7025 strictly to trusted internal systems by using appropriate firewall rules and network segmentation.
  • Keep Zimbra Collaboration Suite updated with the latest security patches to address known vulnerabilities.
  • Implement strong access controls and monitoring to detect unusual activity on internal communication ports.
  • Consider encrypting internal communications or deploying additional security measures such as intrusion detection to enhance the security of mail transfers within the environment.

Related Ports

all 42 in email →

the 8 most looked-up other ports in email — 42 ports carry that label.

portservicerisk
:143IMAPcaution
:995POP3Scaution
:109POP2caution
:2096cPanel SSL Webmailsafe
:110POP3caution
:993IMAPScaution
:1352Lotus Notes RPCcaution
:24Private Mailcaution

risk mix of the 8 listed

  • safe13%
  • caution88%

3 of 8 encrypted