Configuring the SMTP Service
The IIS SMTP service is a simple component for delivering and receiving e-mail messages. A message is transferred to a designated SMTP server to initiate the delivery. The originating SMTP server initiates communications with a DNS server, based on the domain name of the recipient e-mail address. The DNS server looks up and then returns the host name of the destination SMTP server for that domain.
Next, the originating SMTP server communicates with the destination SMTP server directly through TCP/IP port 25. If the user name of the recipient e-mail address matches one of the authorized user accounts on the destination SMTP server, the message is transferred to the destination SMTP sever, where it waits for the recipient ...
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