This article applies to:
- Trustwave MailMarshal (SEG)
Symptoms:
- MMReceiver service does not start.
- Event 3004 appears in Application event log.
- Error: Simple Mail Transport Protocol server is probably already running.
- Initialization Error: Failed to bind socket to <ip address:25>, an MTA (SMTP)-Simple Mail Transport Protocol server is probably already running (typically the Windows 'Simple Mail Transport Protocol' service) - 10048-WSAEADDRINUSE
Causes:
This issue generally occurs when another SMTP service is running on port 25 (such as the native Microsoft Windows SMTP service).
Reply:
Two SMTP services cannot listen on the same port (port 25). To address this issue, choose one of the following actions:
- Disable the other SMTP service if it is not being used.
- Move the other service to a different port if that service is required.
- Move the MailMarshal Receiver Service to a different port if the other service must remain on port 25.
- This article was previously published as:
- NETIQKB40088