- Require TLS and authenticated submission.
- Make sure the server is not an open relay.
- Publish SPF, DKIM and DMARC for the domain.
Port 1143: Infomatryx Exchange
Port 1143 is assigned by IANA to imyx (Infomatryx Exchange).
1143
How imyx works
EmailMail servers hand messages to each other over port 1143, one hop at a time, until the recipient's server.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
Is port 1143 dangerous?
We have no specific security note for port 1143. Its risk depends on the program actually listening on it. General advice for email services:
IANA registry entries for port 1143
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| imyx | 1143 | TCP, UDP | Infomatryx Exchange | - | 2006-03 |
// source: IANA service name and port number registry
Which program uses port 1143, and is it reachable?
Linux
sudo ss -ltnup 'sport = :1143' # process listening on 1143
sudo lsof -nP -i :1143macOS
sudo lsof -nP -i :1143
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1143 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 1143 netstat -ano | findstr :1143
From another machine
nmap -p 1143 -sV <host> sudo nmap -sU -p 1143 <host> nc -zv <host> 1143
Block it in the firewall
sudo ufw deny 1143/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 1143" -Direction Inbound -LocalPort 1143 -Protocol TCP -Action Block # Windows
What is port 1143 used for?
Port 1143 is assigned by IANA to imyx (Infomatryx Exchange).
Is port 1143 TCP or UDP?
Port 1143 is registered for TCP and UDP.
Is it safe to open port 1143?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Require TLS and authenticated submission.
How do I check if port 1143 is open?
On Linux run "ss -ltnup 'sport = :1143'", on macOS "lsof -nP -i :1143", and on Windows "netstat -ano | findstr :1143" to see the local process. From another machine, "nmap -p 1143 <host>" shows whether it is reachable.