NTLM, LDAP, SMTP & RPC protocol
The SMTP sever of Hotmail is smtp.live.com.
If you are using a SMTP server be sure to turn off any option that says SMTP relay.
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Simple Mail Transfer Protocol (SMTP)
SMTP = Simple Mail Transfer Protocol
the smtp host for yahoo is smtp.yahoo.com:25
An SMTP port is the port used to transfer email using the SMTP protocol. Typically SMTP is configured to use TCP port 25, although some servers will use TCP port 587.
Port Number For SMTP(Simple Mail Transfer Protocol) is 25.
MTA (Mail Transfer Agent) and SMTP (Simple Mail Transfer Protocol).
465 is the default port number for SMTP. SMTP stands for Simple Mail Transfer Protocol. It is used for sending Emails over the network.
nitin