The default port used for SMTP is:
The default port used for SMTP is:
The Simple Mail Transfer Protocol (SMTP) by default uses TCP port 25. This is the standard port designated for the transmission of email between mail servers.
23 is Telnet.
Other than Telnet others to look out for HTTP is Port 80 HTTPS is Port 443 SMTP is of course 25 PoP3 is 110 DNS is 53 FTP is 21 SSH is 22 and Ciupaz Port 23 is definitely telnet