18

TCPUDP

MSP

Message Send Protocol

🔓 Security: InsecureStatus: Obsolete📧 Category: Mail

📋 Basic Information

Port Number
18
Protocol
TCPUDP
Service
MSP
Popularity
Low
Description
Protocol for sending short messages between users. An early internet messaging method
Tags
legacymessaging

🔒 Security Information

⚠️

Security Notes

Unauthenticated legacy protocol, use modern messaging systems instead

🔗 Related Ports

25🔥

SMTP

Simple Mail Transfer Protocol

TCP

Standard protocol for sending email between mail servers

⚠️ Security: Depends📧 Category: Mail
587🔥

SMTP-SUBMISSION

SMTP Message Submission

TCP

Mail submission port with STARTTLS encryption

🔒 Security: Secure📧 Category: Mail

📚 References