SMTP protocol and its workings

SMTP protocol and its workings

What is SMTP? Simple mail transfer protocol is one of the first text based protocols that software engineers play with. You can easily fire up a netcat session,talk to a mail server and deliver email. The excitement of seeing a mail sent by using low level semantics is not only very gratifying for a smart programmer it also used to serve a useful purpose. Until the problem of spam came long.

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