The disadvantages are as follows:
SMTP lacks certain types of functions.
SMTP lacks the security specified in X.400.
Its simplicity limits its usefulness.
it is the easiest and fastest way to get email from one place to another Once you transmit your mail to the SMTP server, it will be sending it out. If some failures occur, it will be trying again and again. Since the real SMTP server is constantly connected to the internet, it can try re-sending its failures at any time. As a result, you do not have to worry about failed recipients. If you send direct, you will have to re-send to the temporarily failed recipients several times over to make sure that all the addresses are covered.
Not this is the only reason,there are numerious adventages of SMTP Server which comes as a free component along with windows.simple it is server which was was developed by micrsoft for the purpose of sending mails,managing mail queue's e.t.c.fine if you have organisation where your outgoing mail has value,then you will prefer SMTP otherwise you can use what ever you want,because i don't want to be Religious about Technologies..anyway fact is the i like the way Micrsoft put things..
Simple Mail Transfer Protocol or SMTP is used to send messages from a mail client to a mail server. Some of its disadvantages are: no security or verification, easy to spoof and requires a large amount of administrative overhead.
Disadvantages:
SMTP stands for simple mail transfer protocol. SMTP, is the TCP/IP standard for internet mail .
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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.
Simple Mail Transfer Protocol (SMTP)
SMTP = Simple Mail Transfer Protocol
i need free smtp servers
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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.
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Port Number For SMTP(Simple Mail Transfer Protocol) is 25.