Simple Mail Transfer Protocol - Wikipedia
https://en.wikipedia.org/wiki/Simple_Mail_Transfer_ProtocolAn email client needs to know the IP address of its initial SMTP server and this has to be given as part of its configuration (usually given as a DNS name). This server will deliver outgoing messages on behalf of the user. Server administrators need to impose some control on which clients can use the server. This enables them to deal with abuse, for example spam. Two solutions have been in common use:
What is SMTP? - Tutorialspoint
www.tutorialspoint.com › what-is-smtpMay 04, 2021 · SMTP represents Simple Mail Transfer Protocol. SMTP is a set of interaction guidelines that allow the software to transmit electronic mail over the internet, referred to as Simple Mail Transfer Protocol. The main objective of SMTP is used to set up communication rules between servers.
What is Simple Mail Transfer Protocol (SMTP)?
https://whatismyipaddress.com/smtpSMTP is able to transfer only text—it isn’t able to handle fonts, graphics, attachments, etc.—maybe that’s why it’s called simple. Fortunately, Multipurpose Internet Mail Extensions were created to lend a hand. MIME encodes all the non-text content into plain text. In that transformed format, SMTP is coaxed into transferring the data.