SMTP stands for Simple Mail Transfer Protocol.
SMTP is a set of communication guidelines that allow software to transmit an electronic mail over the internet is called Simple Mail Transfer Protocol.
It is a program used for sending messages to other computer users based on e-mail addresses.
It provides a mail exchange between users on the same or different computers, and it also supports:
It can send a single message to one or more recipients.
Sending message can include text, voice, video or graphics.
It can also send the messages on networks outside the internet.
The main purpose of SMTP is used to set up communication rules between servers. The servers have a way of identifying themselves and announcing what kind of communication they are trying to perform.
They also have a way of handling the errors such as incorrect email address. For example, if the recipient address is wrong, then receiving server reply with an error message of some kind.
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