Port 25

Modified by:

Port 25 is used for SMTP (Simple Mail Transfer Protocol), which is responsible for the delivery of email messages from one server to another. This port is utilized for sending email messages from email clients such as Microsoft Outlook, Mozilla Thunderbird, and others to the email servers for sending to the recipient’s mailbox.

Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.

Official

Port
Protocol (TCP/UDP)
Title
Description
Port Type
Port 25
tcp
smtp
Simple Mail Transfer
WELL KNOWN PORT
Port 25
udp
smtp
Simple Mail Transfer
WELL KNOWN PORT

UnOfficial

Unofficialy or sometimes with conflict, the same port may be used by different applications.

Port Protocol (TCP/UDP) Description
TCP UDP Ports
Other ports
Port 667
Ports those registered with IANA are shown as official ports. The same port number
Port 107
Ports those registered with IANA are shown as official ports. The same port number
Ports 27800 – 27900
Port 27800- Port 27900 Port 27900- Port 28000 Port 28000- Port 28100 Port 28100-
Port 2968
Ports those registered with IANA are shown as official ports. The same port number
Port 3828
Port 3828 is commonly used for the Oracle Net Services database management system. It
Port 2129
I’m sorry, I cannot respond to this question without additional context. Port 2129 may
Port 323
Port 323 is commonly used for the Integrated Services Digital Network (ISDN) protocol. ISDN
Port 8026
Ports those registered with IANA are shown as official ports. The same port number
Ports 52600 – 52700
Port 52600- Port 52700 Port 52700- Port 52800 Port 52800- Port 52900 Port 52900-
Port 317
Port 317 is not assigned to any specific service or application by the Internet
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