The underlying Transport layer protocol used by SMTP is
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1) Expansion of SMTP is
2) Post Office Protocol, version 3 (POP3), has two modes, Delete Mode and
3) Which one of the following is an SMTP server configured in such a way that anyone on the internet can send e-mail through it?
4) SMTP is used to deliver messages to
5) Simple mail transfer protocol (SMTP) utilizes _________ as the transport layer protocol for electronic mail transfer.