SMTP, which stands for Simple Mail Transfer Protocol, is an email protocol used for sending email messages from one email account to another via the internet. Email protocols are sets of rules that let different email clients and accounts easily exchange information, and SMTP is one of the most common ones alongside POP and IMAP.

The Simple Mail Transfer Protocol (SMTP) is a protocol that catches and carries emails to and from mail servers. When configuring an email client, you need to configure either IMAP or POP3 to receive the emails. However, SMTP is used to send messages, which are carried to the mail server.

SMTP stands for Simple Mail Transfer Protocol. The protocol consists of commands that authenticate and direct email transfer. Commonly, SMTP is linked with IMAP or POP3. However, SMTP is the protocol for sending emails, whereas IMAP and POP3 are the protocols for retrieving or receiving emails.